Home / 20,534.57-28,335.60-15,159.86

Finding the Fourth Proportional to 20,534.57, 28,335.60 and 15,159.86

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Solution

The fourth proportional to 20,534.57, 28,335.60 and 15,159.86 is: 20,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,534.57 : 28,335.60 = 15,159.86 : x
  2. Step 2: Convert to fraction form
    20,534.57/28,335.60 = 15,159.86/x
  3. Step 3: Cross multiply
    20,534.57x = 28,335.60 × 15,159.86
  4. Step 4: Simplify right side
    20,534.57x = 429,563,729.02
  5. Step 5: Solve for x
    x = 429,563,729.02/20,534.57
  6. Step 6: Final answer
    x = 20,919.05

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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.