Home / 10,920.80-16,381.32-5,987.77

Finding the Fourth Proportional to 10,920.80, 16,381.32 and 5,987.77

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Solution

The fourth proportional to 10,920.80, 16,381.32 and 5,987.77 is: 8,981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.80 : 16,381.32 = 5,987.77 : x
  2. Step 2: Convert to fraction form
    10,920.80/16,381.32 = 5,987.77/x
  3. Step 3: Cross multiply
    10,920.80x = 16,381.32 × 5,987.77
  4. Step 4: Simplify right side
    10,920.80x = 98,087,494.55
  5. Step 5: Solve for x
    x = 98,087,494.55/10,920.80
  6. Step 6: Final answer
    x = 8,981.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.