Home / 28,322.28-39,084.78-15,747

Finding the Fourth Proportional to 28,322.28, 39,084.78 and 15,747

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Solution

The fourth proportional to 28,322.28, 39,084.78 and 15,747 is: 21,730.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,322.28 : 39,084.78 = 15,747 : x
  2. Step 2: Convert to fraction form
    28,322.28/39,084.78 = 15,747/x
  3. Step 3: Cross multiply
    28,322.28x = 39,084.78 × 15,747
  4. Step 4: Simplify right side
    28,322.28x = 615,468,030.66
  5. Step 5: Solve for x
    x = 615,468,030.66/28,322.28
  6. Step 6: Final answer
    x = 21,730.88

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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.