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Finding the Fourth Proportional to 15,203.80, 20,981.58 and 9,234.52

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Solution

The fourth proportional to 15,203.80, 20,981.58 and 9,234.52 is: 12,743.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.80 : 20,981.58 = 9,234.52 : x
  2. Step 2: Convert to fraction form
    15,203.80/20,981.58 = 9,234.52/x
  3. Step 3: Cross multiply
    15,203.80x = 20,981.58 × 9,234.52
  4. Step 4: Simplify right side
    15,203.80x = 193,754,820.14
  5. Step 5: Solve for x
    x = 193,754,820.14/15,203.80
  6. Step 6: Final answer
    x = 12,743.84

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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.