Home / 28,318.84-39,078.90-15,744.40

Finding the Fourth Proportional to 28,318.84, 39,078.90 and 15,744.40

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Solution

The fourth proportional to 28,318.84, 39,078.90 and 15,744.40 is: 21,726.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.84 : 39,078.90 = 15,744.40 : x
  2. Step 2: Convert to fraction form
    28,318.84/39,078.90 = 15,744.40/x
  3. Step 3: Cross multiply
    28,318.84x = 39,078.90 × 15,744.40
  4. Step 4: Simplify right side
    28,318.84x = 615,273,833.16
  5. Step 5: Solve for x
    x = 615,273,833.16/28,318.84
  6. Step 6: Final answer
    x = 21,726.66

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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.