Home / 8,981.14-12,381.12-6,320.28

Finding the Fourth Proportional to 8,981.14, 12,381.12 and 6,320.28

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Solution

The fourth proportional to 8,981.14, 12,381.12 and 6,320.28 is: 8,712.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.14 : 12,381.12 = 6,320.28 : x
  2. Step 2: Convert to fraction form
    8,981.14/12,381.12 = 6,320.28/x
  3. Step 3: Cross multiply
    8,981.14x = 12,381.12 × 6,320.28
  4. Step 4: Simplify right side
    8,981.14x = 78,252,145.11
  5. Step 5: Solve for x
    x = 78,252,145.11/8,981.14
  6. Step 6: Final answer
    x = 8,712.94

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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.