Home / 20,641.55-28,497.14-13,588.47

Finding the Fourth Proportional to 20,641.55, 28,497.14 and 13,588.47

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Solution

The fourth proportional to 20,641.55, 28,497.14 and 13,588.47 is: 18,759.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.55 : 28,497.14 = 13,588.47 : x
  2. Step 2: Convert to fraction form
    20,641.55/28,497.14 = 13,588.47/x
  3. Step 3: Cross multiply
    20,641.55x = 28,497.14 × 13,588.47
  4. Step 4: Simplify right side
    20,641.55x = 387,232,531.98
  5. Step 5: Solve for x
    x = 387,232,531.98/20,641.55
  6. Step 6: Final answer
    x = 18,759.86

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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.