Home / 28,007.28-38,648.52-15,431.04

Finding the Fourth Proportional to 28,007.28, 38,648.52 and 15,431.04

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Solution

The fourth proportional to 28,007.28, 38,648.52 and 15,431.04 is: 21,293.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.28 : 38,648.52 = 15,431.04 : x
  2. Step 2: Convert to fraction form
    28,007.28/38,648.52 = 15,431.04/x
  3. Step 3: Cross multiply
    28,007.28x = 38,648.52 × 15,431.04
  4. Step 4: Simplify right side
    28,007.28x = 596,386,858.06
  5. Step 5: Solve for x
    x = 596,386,858.06/28,007.28
  6. Step 6: Final answer
    x = 21,293.99

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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.