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Finding the Fourth Proportional to 7,114.76, 9,818.52 and 3,970.88

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Solution

The fourth proportional to 7,114.76, 9,818.52 and 3,970.88 is: 5,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.76 : 9,818.52 = 3,970.88 : x
  2. Step 2: Convert to fraction form
    7,114.76/9,818.52 = 3,970.88/x
  3. Step 3: Cross multiply
    7,114.76x = 9,818.52 × 3,970.88
  4. Step 4: Simplify right side
    7,114.76x = 38,988,164.70
  5. Step 5: Solve for x
    x = 38,988,164.70/7,114.76
  6. Step 6: Final answer
    x = 5,479.90

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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.