Home / 20,417.22-28,193.49-12,877.02

Finding the Fourth Proportional to 20,417.22, 28,193.49 and 12,877.02

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Solution

The fourth proportional to 20,417.22, 28,193.49 and 12,877.02 is: 17,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.22 : 28,193.49 = 12,877.02 : x
  2. Step 2: Convert to fraction form
    20,417.22/28,193.49 = 12,877.02/x
  3. Step 3: Cross multiply
    20,417.22x = 28,193.49 × 12,877.02
  4. Step 4: Simplify right side
    20,417.22x = 363,048,134.60
  5. Step 5: Solve for x
    x = 363,048,134.60/20,417.22
  6. Step 6: Final answer
    x = 17,781.47

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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.