Home / 20,402.47-28,155.66-12,445.44

Finding the Fourth Proportional to 20,402.47, 28,155.66 and 12,445.44

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Solution

The fourth proportional to 20,402.47, 28,155.66 and 12,445.44 is: 17,174.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.47 : 28,155.66 = 12,445.44 : x
  2. Step 2: Convert to fraction form
    20,402.47/28,155.66 = 12,445.44/x
  3. Step 3: Cross multiply
    20,402.47x = 28,155.66 × 12,445.44
  4. Step 4: Simplify right side
    20,402.47x = 350,409,577.19
  5. Step 5: Solve for x
    x = 350,409,577.19/20,402.47
  6. Step 6: Final answer
    x = 17,174.86

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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.