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Finding the Fourth Proportional to 8,700.48, 12,021.12 and 6,945.12

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Solution

The fourth proportional to 8,700.48, 12,021.12 and 6,945.12 is: 9,595.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.48 : 12,021.12 = 6,945.12 : x
  2. Step 2: Convert to fraction form
    8,700.48/12,021.12 = 6,945.12/x
  3. Step 3: Cross multiply
    8,700.48x = 12,021.12 × 6,945.12
  4. Step 4: Simplify right side
    8,700.48x = 83,488,120.93
  5. Step 5: Solve for x
    x = 83,488,120.93/8,700.48
  6. Step 6: Final answer
    x = 9,595.81

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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.