Home / 28,406.19-39,197.90-15,657.15

Finding the Fourth Proportional to 28,406.19, 39,197.90 and 15,657.15

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Solution

The fourth proportional to 28,406.19, 39,197.90 and 15,657.15 is: 21,605.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.19 : 39,197.90 = 15,657.15 : x
  2. Step 2: Convert to fraction form
    28,406.19/39,197.90 = 15,657.15/x
  3. Step 3: Cross multiply
    28,406.19x = 39,197.90 × 15,657.15
  4. Step 4: Simplify right side
    28,406.19x = 613,727,321.70
  5. Step 5: Solve for x
    x = 613,727,321.70/28,406.19
  6. Step 6: Final answer
    x = 21,605.41

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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.