Home / 8,471,805.90-12,707,708.85-7,887,220.80

Finding the Fourth Proportional to 8,471,805.90, 12,707,708.85 and 7,887,220.80

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Solution

The fourth proportional to 8,471,805.90, 12,707,708.85 and 7,887,220.80 is: 11,830,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,471,805.90 : 12,707,708.85 = 7,887,220.80 : x
  2. Step 2: Convert to fraction form
    8,471,805.90/12,707,708.85 = 7,887,220.80/x
  3. Step 3: Cross multiply
    8,471,805.90x = 12,707,708.85 × 7,887,220.80
  4. Step 4: Simplify right side
    8,471,805.90x = 100,228,505,562,064.08
  5. Step 5: Solve for x
    x = 100,228,505,562,064.08/8,471,805.90
  6. Step 6: Final answer
    x = 11,830,831.20

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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.