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Finding the Fourth Proportional to 7,335.65, 10,123.17 and 3,978.45

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Solution

The fourth proportional to 7,335.65, 10,123.17 and 3,978.45 is: 5,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,335.65 : 10,123.17 = 3,978.45 : x
  2. Step 2: Convert to fraction form
    7,335.65/10,123.17 = 3,978.45/x
  3. Step 3: Cross multiply
    7,335.65x = 10,123.17 × 3,978.45
  4. Step 4: Simplify right side
    7,335.65x = 40,274,555.97
  5. Step 5: Solve for x
    x = 40,274,555.97/7,335.65
  6. Step 6: Final answer
    x = 5,490.25

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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.