Home / 20,825.68-28,740-12,447.04

Finding the Fourth Proportional to 20,825.68, 28,740 and 12,447.04

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Solution

The fourth proportional to 20,825.68, 28,740 and 12,447.04 is: 17,177.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.68 : 28,740 = 12,447.04 : x
  2. Step 2: Convert to fraction form
    20,825.68/28,740 = 12,447.04/x
  3. Step 3: Cross multiply
    20,825.68x = 28,740 × 12,447.04
  4. Step 4: Simplify right side
    20,825.68x = 357,727,929.60
  5. Step 5: Solve for x
    x = 357,727,929.60/20,825.68
  6. Step 6: Final answer
    x = 17,177.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.