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Finding the Fourth Proportional to 13,061.64, 18,019.08 and 9,869.16

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Solution

The fourth proportional to 13,061.64, 18,019.08 and 9,869.16 is: 13,614.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,061.64 : 18,019.08 = 9,869.16 : x
  2. Step 2: Convert to fraction form
    13,061.64/18,019.08 = 9,869.16/x
  3. Step 3: Cross multiply
    13,061.64x = 18,019.08 × 9,869.16
  4. Step 4: Simplify right side
    13,061.64x = 177,833,183.57
  5. Step 5: Solve for x
    x = 177,833,183.57/13,061.64
  6. Step 6: Final answer
    x = 13,614.92

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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.