Home / 14,613.84-21,920-12,989.04

Finding the Fourth Proportional to 14,613.84, 21,920 and 12,989.04

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Solution

The fourth proportional to 14,613.84, 21,920 and 12,989.04 is: 19,482.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,613.84 : 21,920 = 12,989.04 : x
  2. Step 2: Convert to fraction form
    14,613.84/21,920 = 12,989.04/x
  3. Step 3: Cross multiply
    14,613.84x = 21,920 × 12,989.04
  4. Step 4: Simplify right side
    14,613.84x = 284,719,756.80
  5. Step 5: Solve for x
    x = 284,719,756.80/14,613.84
  6. Step 6: Final answer
    x = 19,482.88

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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.