Home / 18,711.19-25,820.80-11,153.63

Finding the Fourth Proportional to 18,711.19, 25,820.80 and 11,153.63

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Solution

The fourth proportional to 18,711.19, 25,820.80 and 11,153.63 is: 15,391.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.19 : 25,820.80 = 11,153.63 : x
  2. Step 2: Convert to fraction form
    18,711.19/25,820.80 = 11,153.63/x
  3. Step 3: Cross multiply
    18,711.19x = 25,820.80 × 11,153.63
  4. Step 4: Simplify right side
    18,711.19x = 287,995,492.52
  5. Step 5: Solve for x
    x = 287,995,492.52/18,711.19
  6. Step 6: Final answer
    x = 15,391.62

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Half scale
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Double scale
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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.