Home / 28,565.40-39,419.34-15,819.12

Finding the Fourth Proportional to 28,565.40, 39,419.34 and 15,819.12

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Solution

The fourth proportional to 28,565.40, 39,419.34 and 15,819.12 is: 21,829.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.40 : 39,419.34 = 15,819.12 : x
  2. Step 2: Convert to fraction form
    28,565.40/39,419.34 = 15,819.12/x
  3. Step 3: Cross multiply
    28,565.40x = 39,419.34 × 15,819.12
  4. Step 4: Simplify right side
    28,565.40x = 623,579,269.78
  5. Step 5: Solve for x
    x = 623,579,269.78/28,565.40
  6. Step 6: Final answer
    x = 21,829.88

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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.