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Finding the Fourth Proportional to 10,866.92, 14,995.50 and 6,390.84

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Solution

The fourth proportional to 10,866.92, 14,995.50 and 6,390.84 is: 8,818.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.92 : 14,995.50 = 6,390.84 : x
  2. Step 2: Convert to fraction form
    10,866.92/14,995.50 = 6,390.84/x
  3. Step 3: Cross multiply
    10,866.92x = 14,995.50 × 6,390.84
  4. Step 4: Simplify right side
    10,866.92x = 95,833,841.22
  5. Step 5: Solve for x
    x = 95,833,841.22/10,866.92
  6. Step 6: Final answer
    x = 8,818.86

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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.