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Finding the Fourth Proportional to 15,121.48, 20,866.98 and 8,747.08

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Solution

The fourth proportional to 15,121.48, 20,866.98 and 8,747.08 is: 12,070.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.48 : 20,866.98 = 8,747.08 : x
  2. Step 2: Convert to fraction form
    15,121.48/20,866.98 = 8,747.08/x
  3. Step 3: Cross multiply
    15,121.48x = 20,866.98 × 8,747.08
  4. Step 4: Simplify right side
    15,121.48x = 182,525,143.42
  5. Step 5: Solve for x
    x = 182,525,143.42/15,121.48
  6. Step 6: Final answer
    x = 12,070.59

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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.