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Finding the Fourth Proportional to 8,320.31, 12,495.33 and 7,985.85

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Solution

The fourth proportional to 8,320.31, 12,495.33 and 7,985.85 is: 11,993.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.31 : 12,495.33 = 7,985.85 : x
  2. Step 2: Convert to fraction form
    8,320.31/12,495.33 = 7,985.85/x
  3. Step 3: Cross multiply
    8,320.31x = 12,495.33 × 7,985.85
  4. Step 4: Simplify right side
    8,320.31x = 99,785,831.08
  5. Step 5: Solve for x
    x = 99,785,831.08/8,320.31
  6. Step 6: Final answer
    x = 11,993.05

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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.