Home / 15,085,689.10-20,820,444.87-8,471,020.12

Finding the Fourth Proportional to 15,085,689.10, 20,820,444.87 and 8,471,020.12

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Solution

The fourth proportional to 15,085,689.10, 20,820,444.87 and 8,471,020.12 is: 11,691,239.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085,689.10 : 20,820,444.87 = 8,471,020.12 : x
  2. Step 2: Convert to fraction form
    15,085,689.10/20,820,444.87 = 8,471,020.12/x
  3. Step 3: Cross multiply
    15,085,689.10x = 20,820,444.87 × 8,471,020.12
  4. Step 4: Simplify right side
    15,085,689.10x = 176,370,407,401,120.78
  5. Step 5: Solve for x
    x = 176,370,407,401,120.78/15,085,689.10
  6. Step 6: Final answer
    x = 11,691,239.71

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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.