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Finding the Fourth Proportional to 20,691,786.60, 31,037,679.90 and 9,903,534.30

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Solution

The fourth proportional to 20,691,786.60, 31,037,679.90 and 9,903,534.30 is: 14,855,301.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691,786.60 : 31,037,679.90 = 9,903,534.30 : x
  2. Step 2: Convert to fraction form
    20,691,786.60/31,037,679.90 = 9,903,534.30/x
  3. Step 3: Cross multiply
    20,691,786.60x = 31,037,679.90 × 9,903,534.30
  4. Step 4: Simplify right side
    20,691,786.60x = 307,382,727,482,070.56
  5. Step 5: Solve for x
    x = 307,382,727,482,070.56/20,691,786.60
  6. Step 6: Final answer
    x = 14,855,301.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.