Home / 8,981.51-12,381.62-6,320.66

Finding the Fourth Proportional to 8,981.51, 12,381.62 and 6,320.66

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Solution

The fourth proportional to 8,981.51, 12,381.62 and 6,320.66 is: 8,713.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.51 : 12,381.62 = 6,320.66 : x
  2. Step 2: Convert to fraction form
    8,981.51/12,381.62 = 6,320.66/x
  3. Step 3: Cross multiply
    8,981.51x = 12,381.62 × 6,320.66
  4. Step 4: Simplify right side
    8,981.51x = 78,259,916.76
  5. Step 5: Solve for x
    x = 78,259,916.76/8,981.51
  6. Step 6: Final answer
    x = 8,713.45

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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.