Home / 18,711.11-25,820.69-11,153.55

Finding the Fourth Proportional to 18,711.11, 25,820.69 and 11,153.55

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Solution

The fourth proportional to 18,711.11, 25,820.69 and 11,153.55 is: 15,391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.11 : 25,820.69 = 11,153.55 : x
  2. Step 2: Convert to fraction form
    18,711.11/25,820.69 = 11,153.55/x
  3. Step 3: Cross multiply
    18,711.11x = 25,820.69 × 11,153.55
  4. Step 4: Simplify right side
    18,711.11x = 287,992,356.95
  5. Step 5: Solve for x
    x = 287,992,356.95/18,711.11
  6. Step 6: Final answer
    x = 15,391.52

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Half scale
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Double scale
Find fourth proportional to 18,712.11, 25,822.07 and 11,154.55
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.