Home / 20,811,931.20-31,217,896.80-20,493,066.60

Finding the Fourth Proportional to 20,811,931.20, 31,217,896.80 and 20,493,066.60

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Solution

The fourth proportional to 20,811,931.20, 31,217,896.80 and 20,493,066.60 is: 30,739,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811,931.20 : 31,217,896.80 = 20,493,066.60 : x
  2. Step 2: Convert to fraction form
    20,811,931.20/31,217,896.80 = 20,493,066.60/x
  3. Step 3: Cross multiply
    20,811,931.20x = 31,217,896.80 × 20,493,066.60
  4. Step 4: Simplify right side
    20,811,931.20x = 639,750,438,234,327
  5. Step 5: Solve for x
    x = 639,750,438,234,327/20,811,931.20
  6. Step 6: Final answer
    x = 30,739,599.90

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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.