Home / 7,123.62-9,830.40-3,937.15

Finding the Fourth Proportional to 7,123.62, 9,830.40 and 3,937.15

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Solution

The fourth proportional to 7,123.62, 9,830.40 and 3,937.15 is: 5,433.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.62 : 9,830.40 = 3,937.15 : x
  2. Step 2: Convert to fraction form
    7,123.62/9,830.40 = 3,937.15/x
  3. Step 3: Cross multiply
    7,123.62x = 9,830.40 × 3,937.15
  4. Step 4: Simplify right side
    7,123.62x = 38,703,759.36
  5. Step 5: Solve for x
    x = 38,703,759.36/7,123.62
  6. Step 6: Final answer
    x = 5,433.16

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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.