Home / 7,336.09-10,123.78-3,978.89

Finding the Fourth Proportional to 7,336.09, 10,123.78 and 3,978.89

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Solution

The fourth proportional to 7,336.09, 10,123.78 and 3,978.89 is: 5,490.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,336.09 : 10,123.78 = 3,978.89 : x
  2. Step 2: Convert to fraction form
    7,336.09/10,123.78 = 3,978.89/x
  3. Step 3: Cross multiply
    7,336.09x = 10,123.78 × 3,978.89
  4. Step 4: Simplify right side
    7,336.09x = 40,281,387.11
  5. Step 5: Solve for x
    x = 40,281,387.11/7,336.09
  6. Step 6: Final answer
    x = 5,490.85

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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.