Home / 22,381.68-30,886.88-12,309.76

Finding the Fourth Proportional to 22,381.68, 30,886.88 and 12,309.76

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Solution

The fourth proportional to 22,381.68, 30,886.88 and 12,309.76 is: 16,987.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,381.68 : 30,886.88 = 12,309.76 : x
  2. Step 2: Convert to fraction form
    22,381.68/30,886.88 = 12,309.76/x
  3. Step 3: Cross multiply
    22,381.68x = 30,886.88 × 12,309.76
  4. Step 4: Simplify right side
    22,381.68x = 380,210,079.95
  5. Step 5: Solve for x
    x = 380,210,079.95/22,381.68
  6. Step 6: Final answer
    x = 16,987.56

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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.