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Finding the Fourth Proportional to 7,875.38, 10,867.74 and 4,338.38

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Solution

The fourth proportional to 7,875.38, 10,867.74 and 4,338.38 is: 5,986.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.38 : 10,867.74 = 4,338.38 : x
  2. Step 2: Convert to fraction form
    7,875.38/10,867.74 = 4,338.38/x
  3. Step 3: Cross multiply
    7,875.38x = 10,867.74 × 4,338.38
  4. Step 4: Simplify right side
    7,875.38x = 47,148,385.86
  5. Step 5: Solve for x
    x = 47,148,385.86/7,875.38
  6. Step 6: Final answer
    x = 5,986.81

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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.