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Finding the Fourth Proportional to 7,038.60, 9,718.02 and 6,446.76

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Solution

The fourth proportional to 7,038.60, 9,718.02 and 6,446.76 is: 8,900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,038.60 : 9,718.02 = 6,446.76 : x
  2. Step 2: Convert to fraction form
    7,038.60/9,718.02 = 6,446.76/x
  3. Step 3: Cross multiply
    7,038.60x = 9,718.02 × 6,446.76
  4. Step 4: Simplify right side
    7,038.60x = 62,649,742.62
  5. Step 5: Solve for x
    x = 62,649,742.62/7,038.60
  6. Step 6: Final answer
    x = 8,900.88

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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.