Home / 15,890.18-21,929.74-8,818.88

Finding the Fourth Proportional to 15,890.18, 21,929.74 and 8,818.88

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Solution

The fourth proportional to 15,890.18, 21,929.74 and 8,818.88 is: 12,170.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.18 : 21,929.74 = 8,818.88 : x
  2. Step 2: Convert to fraction form
    15,890.18/21,929.74 = 8,818.88/x
  3. Step 3: Cross multiply
    15,890.18x = 21,929.74 × 8,818.88
  4. Step 4: Simplify right side
    15,890.18x = 193,395,613.80
  5. Step 5: Solve for x
    x = 193,395,613.80/15,890.18
  6. Step 6: Final answer
    x = 12,170.77

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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.