Home / 28,439.71-39,249.01-15,695.43

Finding the Fourth Proportional to 28,439.71, 39,249.01 and 15,695.43

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Solution

The fourth proportional to 28,439.71, 39,249.01 and 15,695.43 is: 21,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.71 : 39,249.01 = 15,695.43 : x
  2. Step 2: Convert to fraction form
    28,439.71/39,249.01 = 15,695.43/x
  3. Step 3: Cross multiply
    28,439.71x = 39,249.01 × 15,695.43
  4. Step 4: Simplify right side
    28,439.71x = 616,030,089.02
  5. Step 5: Solve for x
    x = 616,030,089.02/28,439.71
  6. Step 6: Final answer
    x = 21,660.91

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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.