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Finding the Fourth Proportional to 15,658.50, 21,620.07 and 10,079.22

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Solution

The fourth proportional to 15,658.50, 21,620.07 and 10,079.22 is: 13,916.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.50 : 21,620.07 = 10,079.22 : x
  2. Step 2: Convert to fraction form
    15,658.50/21,620.07 = 10,079.22/x
  3. Step 3: Cross multiply
    15,658.50x = 21,620.07 × 10,079.22
  4. Step 4: Simplify right side
    15,658.50x = 217,913,441.95
  5. Step 5: Solve for x
    x = 217,913,441.95/15,658.50
  6. Step 6: Final answer
    x = 13,916.62

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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.