Home / 20,693,613.40-28,555,820.19-12,428,764.72

Finding the Fourth Proportional to 20,693,613.40, 28,555,820.19 and 12,428,764.72

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Solution

The fourth proportional to 20,693,613.40, 28,555,820.19 and 12,428,764.72 is: 17,150,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693,613.40 : 28,555,820.19 = 12,428,764.72 : x
  2. Step 2: Convert to fraction form
    20,693,613.40/28,555,820.19 = 12,428,764.72/x
  3. Step 3: Cross multiply
    20,693,613.40x = 28,555,820.19 × 12,428,764.72
  4. Step 4: Simplify right side
    20,693,613.40x = 354,913,570,528,135.75
  5. Step 5: Solve for x
    x = 354,913,570,528,135.75/20,693,613.40
  6. Step 6: Final answer
    x = 17,150,874.70

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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.