Home / 20,913.12-31,350.42-9,059.45

Finding the Fourth Proportional to 20,913.12, 31,350.42 and 9,059.45

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Solution

The fourth proportional to 20,913.12, 31,350.42 and 9,059.45 is: 13,580.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.12 : 31,350.42 = 9,059.45 : x
  2. Step 2: Convert to fraction form
    20,913.12/31,350.42 = 9,059.45/x
  3. Step 3: Cross multiply
    20,913.12x = 31,350.42 × 9,059.45
  4. Step 4: Simplify right side
    20,913.12x = 284,017,562.47
  5. Step 5: Solve for x
    x = 284,017,562.47/20,913.12
  6. Step 6: Final answer
    x = 13,580.83

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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.