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Finding the Fourth Proportional to 13,158.64, 18,159.32 and 7,569.64

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Solution

The fourth proportional to 13,158.64, 18,159.32 and 7,569.64 is: 10,446.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.64 : 18,159.32 = 7,569.64 : x
  2. Step 2: Convert to fraction form
    13,158.64/18,159.32 = 7,569.64/x
  3. Step 3: Cross multiply
    13,158.64x = 18,159.32 × 7,569.64
  4. Step 4: Simplify right side
    13,158.64x = 137,459,515.04
  5. Step 5: Solve for x
    x = 137,459,515.04/13,158.64
  6. Step 6: Final answer
    x = 10,446.33

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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.