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Finding the Fourth Proportional to 15,012.96, 20,719.20 and 9,044.64

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Solution

The fourth proportional to 15,012.96, 20,719.20 and 9,044.64 is: 12,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.96 : 20,719.20 = 9,044.64 : x
  2. Step 2: Convert to fraction form
    15,012.96/20,719.20 = 9,044.64/x
  3. Step 3: Cross multiply
    15,012.96x = 20,719.20 × 9,044.64
  4. Step 4: Simplify right side
    15,012.96x = 187,397,705.09
  5. Step 5: Solve for x
    x = 187,397,705.09/15,012.96
  6. Step 6: Final answer
    x = 12,482.40

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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.