Home / 20,266.20-30,384.90-7,781.40

Finding the Fourth Proportional to 20,266.20, 30,384.90 and 7,781.40

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Solution

The fourth proportional to 20,266.20, 30,384.90 and 7,781.40 is: 11,666.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.20 : 30,384.90 = 7,781.40 : x
  2. Step 2: Convert to fraction form
    20,266.20/30,384.90 = 7,781.40/x
  3. Step 3: Cross multiply
    20,266.20x = 30,384.90 × 7,781.40
  4. Step 4: Simplify right side
    20,266.20x = 236,437,060.86
  5. Step 5: Solve for x
    x = 236,437,060.86/20,266.20
  6. Step 6: Final answer
    x = 11,666.57

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1.5x scale

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.