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Finding the Fourth Proportional to 7,101.68, 9,809.88 and 6,439.28

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Solution

The fourth proportional to 7,101.68, 9,809.88 and 6,439.28 is: 8,894.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,101.68 : 9,809.88 = 6,439.28 : x
  2. Step 2: Convert to fraction form
    7,101.68/9,809.88 = 6,439.28/x
  3. Step 3: Cross multiply
    7,101.68x = 9,809.88 × 6,439.28
  4. Step 4: Simplify right side
    7,101.68x = 63,168,564.09
  5. Step 5: Solve for x
    x = 63,168,564.09/7,101.68
  6. Step 6: Final answer
    x = 8,894.88

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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.