Home / 28,425.24-39,224.66-15,678.90

Finding the Fourth Proportional to 28,425.24, 39,224.66 and 15,678.90

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Solution

The fourth proportional to 28,425.24, 39,224.66 and 15,678.90 is: 21,635.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.24 : 39,224.66 = 15,678.90 : x
  2. Step 2: Convert to fraction form
    28,425.24/39,224.66 = 15,678.90/x
  3. Step 3: Cross multiply
    28,425.24x = 39,224.66 × 15,678.90
  4. Step 4: Simplify right side
    28,425.24x = 614,999,521.67
  5. Step 5: Solve for x
    x = 614,999,521.67/28,425.24
  6. Step 6: Final answer
    x = 21,635.68

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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.