Home / 28,490.15-39,316.20-15,744.20

Finding the Fourth Proportional to 28,490.15, 39,316.20 and 15,744.20

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Solution

The fourth proportional to 28,490.15, 39,316.20 and 15,744.20 is: 21,726.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.15 : 39,316.20 = 15,744.20 : x
  2. Step 2: Convert to fraction form
    28,490.15/39,316.20 = 15,744.20/x
  3. Step 3: Cross multiply
    28,490.15x = 39,316.20 × 15,744.20
  4. Step 4: Simplify right side
    28,490.15x = 619,001,860.42
  5. Step 5: Solve for x
    x = 619,001,860.42/28,490.15
  6. Step 6: Final answer
    x = 21,726.87

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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.