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Finding the Fourth Proportional to 15,655.70, 21,605.87 and 8,582.14

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Solution

The fourth proportional to 15,655.70, 21,605.87 and 8,582.14 is: 11,843.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.70 : 21,605.87 = 8,582.14 : x
  2. Step 2: Convert to fraction form
    15,655.70/21,605.87 = 8,582.14/x
  3. Step 3: Cross multiply
    15,655.70x = 21,605.87 × 8,582.14
  4. Step 4: Simplify right side
    15,655.70x = 185,424,601.16
  5. Step 5: Solve for x
    x = 185,424,601.16/15,655.70
  6. Step 6: Final answer
    x = 11,843.90

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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.