Home / 9,319.90-12,861.81-5,341.78

Finding the Fourth Proportional to 9,319.90, 12,861.81 and 5,341.78

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Solution

The fourth proportional to 9,319.90, 12,861.81 and 5,341.78 is: 7,371.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.90 : 12,861.81 = 5,341.78 : x
  2. Step 2: Convert to fraction form
    9,319.90/12,861.81 = 5,341.78/x
  3. Step 3: Cross multiply
    9,319.90x = 12,861.81 × 5,341.78
  4. Step 4: Simplify right side
    9,319.90x = 68,704,868.40
  5. Step 5: Solve for x
    x = 68,704,868.40/9,319.90
  6. Step 6: Final answer
    x = 7,371.85

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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.