Home / 28,428.41-39,229.43-15,681.74

Finding the Fourth Proportional to 28,428.41, 39,229.43 and 15,681.74

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Solution

The fourth proportional to 28,428.41, 39,229.43 and 15,681.74 is: 21,639.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.41 : 39,229.43 = 15,681.74 : x
  2. Step 2: Convert to fraction form
    28,428.41/39,229.43 = 15,681.74/x
  3. Step 3: Cross multiply
    28,428.41x = 39,229.43 × 15,681.74
  4. Step 4: Simplify right side
    28,428.41x = 615,185,721.61
  5. Step 5: Solve for x
    x = 615,185,721.61/28,428.41
  6. Step 6: Final answer
    x = 21,639.82

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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.