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Finding the Fourth Proportional to 18,142.68, 25,018.48 and 17,084.40

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Solution

The fourth proportional to 18,142.68, 25,018.48 and 17,084.40 is: 23,559.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,142.68 : 25,018.48 = 17,084.40 : x
  2. Step 2: Convert to fraction form
    18,142.68/25,018.48 = 17,084.40/x
  3. Step 3: Cross multiply
    18,142.68x = 25,018.48 × 17,084.40
  4. Step 4: Simplify right side
    18,142.68x = 427,425,719.71
  5. Step 5: Solve for x
    x = 427,425,719.71/18,142.68
  6. Step 6: Final answer
    x = 23,559.13

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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.