Home / 21,859.98-30,180.51-15,143.13

Finding the Fourth Proportional to 21,859.98, 30,180.51 and 15,143.13

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Solution

The fourth proportional to 21,859.98, 30,180.51 and 15,143.13 is: 20,907.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.98 : 30,180.51 = 15,143.13 : x
  2. Step 2: Convert to fraction form
    21,859.98/30,180.51 = 15,143.13/x
  3. Step 3: Cross multiply
    21,859.98x = 30,180.51 × 15,143.13
  4. Step 4: Simplify right side
    21,859.98x = 457,027,386.40
  5. Step 5: Solve for x
    x = 457,027,386.40/21,859.98
  6. Step 6: Final answer
    x = 20,907.04

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Double scale
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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.