Home / 28,720.91-39,634.17-15,623.57

Finding the Fourth Proportional to 28,720.91, 39,634.17 and 15,623.57

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Solution

The fourth proportional to 28,720.91, 39,634.17 and 15,623.57 is: 21,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.91 : 39,634.17 = 15,623.57 : x
  2. Step 2: Convert to fraction form
    28,720.91/39,634.17 = 15,623.57/x
  3. Step 3: Cross multiply
    28,720.91x = 39,634.17 × 15,623.57
  4. Step 4: Simplify right side
    28,720.91x = 619,227,269.88
  5. Step 5: Solve for x
    x = 619,227,269.88/28,720.91
  6. Step 6: Final answer
    x = 21,560.15

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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.