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Finding the Fourth Proportional to 18,143.68, 25,019.86 and 17,085.40

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Solution

The fourth proportional to 18,143.68, 25,019.86 and 17,085.40 is: 23,560.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.68 : 25,019.86 = 17,085.40 : x
  2. Step 2: Convert to fraction form
    18,143.68/25,019.86 = 17,085.40/x
  3. Step 3: Cross multiply
    18,143.68x = 25,019.86 × 17,085.40
  4. Step 4: Simplify right side
    18,143.68x = 427,474,316.04
  5. Step 5: Solve for x
    x = 427,474,316.04/18,143.68
  6. Step 6: Final answer
    x = 23,560.51

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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.