Home / 8,981.12-12,388.34-6,424.16

Finding the Fourth Proportional to 8,981.12, 12,388.34 and 6,424.16

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Solution

The fourth proportional to 8,981.12, 12,388.34 and 6,424.16 is: 8,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.12 : 12,388.34 = 6,424.16 : x
  2. Step 2: Convert to fraction form
    8,981.12/12,388.34 = 6,424.16/x
  3. Step 3: Cross multiply
    8,981.12x = 12,388.34 × 6,424.16
  4. Step 4: Simplify right side
    8,981.12x = 79,584,646.17
  5. Step 5: Solve for x
    x = 79,584,646.17/8,981.12
  6. Step 6: Final answer
    x = 8,861.33

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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.