Home / 12,128,546.80-18,192,820.20-8,709,609.70

Finding the Fourth Proportional to 12,128,546.80, 18,192,820.20 and 8,709,609.70

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Solution

The fourth proportional to 12,128,546.80, 18,192,820.20 and 8,709,609.70 is: 13,064,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,546.80 : 18,192,820.20 = 8,709,609.70 : x
  2. Step 2: Convert to fraction form
    12,128,546.80/18,192,820.20 = 8,709,609.70/x
  3. Step 3: Cross multiply
    12,128,546.80x = 18,192,820.20 × 8,709,609.70
  4. Step 4: Simplify right side
    12,128,546.80x = 158,452,363,284,275.91
  5. Step 5: Solve for x
    x = 158,452,363,284,275.91/12,128,546.80
  6. Step 6: Final answer
    x = 13,064,414.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.