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Finding the Fourth Proportional to 8,663.99, 12,988.47 and 5,369.82

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Solution

The fourth proportional to 8,663.99, 12,988.47 and 5,369.82 is: 8,050.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.99 : 12,988.47 = 5,369.82 : x
  2. Step 2: Convert to fraction form
    8,663.99/12,988.47 = 5,369.82/x
  3. Step 3: Cross multiply
    8,663.99x = 12,988.47 × 5,369.82
  4. Step 4: Simplify right side
    8,663.99x = 69,745,719.13
  5. Step 5: Solve for x
    x = 69,745,719.13/8,663.99
  6. Step 6: Final answer
    x = 8,050.07

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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.