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Finding the Fourth Proportional to 8,744.68, 12,071.70 and 6,390.28

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Solution

The fourth proportional to 8,744.68, 12,071.70 and 6,390.28 is: 8,821.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,744.68 : 12,071.70 = 6,390.28 : x
  2. Step 2: Convert to fraction form
    8,744.68/12,071.70 = 6,390.28/x
  3. Step 3: Cross multiply
    8,744.68x = 12,071.70 × 6,390.28
  4. Step 4: Simplify right side
    8,744.68x = 77,141,543.08
  5. Step 5: Solve for x
    x = 77,141,543.08/8,744.68
  6. Step 6: Final answer
    x = 8,821.54

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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.