Home / 20,915.64-28,686.60-18,553.68

Finding the Fourth Proportional to 20,915.64, 28,686.60 and 18,553.68

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Solution

The fourth proportional to 20,915.64, 28,686.60 and 18,553.68 is: 25,447.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.64 : 28,686.60 = 18,553.68 : x
  2. Step 2: Convert to fraction form
    20,915.64/28,686.60 = 18,553.68/x
  3. Step 3: Cross multiply
    20,915.64x = 28,686.60 × 18,553.68
  4. Step 4: Simplify right side
    20,915.64x = 532,241,996.69
  5. Step 5: Solve for x
    x = 532,241,996.69/20,915.64
  6. Step 6: Final answer
    x = 25,447.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.