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Finding the Fourth Proportional to 20,559.68, 30,814.69 and 10,013.90

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Solution

The fourth proportional to 20,559.68, 30,814.69 and 10,013.90 is: 15,008.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.68 : 30,814.69 = 10,013.90 : x
  2. Step 2: Convert to fraction form
    20,559.68/30,814.69 = 10,013.90/x
  3. Step 3: Cross multiply
    20,559.68x = 30,814.69 × 10,013.90
  4. Step 4: Simplify right side
    20,559.68x = 308,575,276.19
  5. Step 5: Solve for x
    x = 308,575,276.19/20,559.68
  6. Step 6: Final answer
    x = 15,008.76

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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.