Home / 28,336.28-39,104.16-15,590.78

Finding the Fourth Proportional to 28,336.28, 39,104.16 and 15,590.78

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Solution

The fourth proportional to 28,336.28, 39,104.16 and 15,590.78 is: 21,515.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.28 : 39,104.16 = 15,590.78 : x
  2. Step 2: Convert to fraction form
    28,336.28/39,104.16 = 15,590.78/x
  3. Step 3: Cross multiply
    28,336.28x = 39,104.16 × 15,590.78
  4. Step 4: Simplify right side
    28,336.28x = 609,664,160.12
  5. Step 5: Solve for x
    x = 609,664,160.12/28,336.28
  6. Step 6: Final answer
    x = 21,515.32

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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.