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Finding the Fourth Proportional to 18,325.53, 25,285.09 and 11,159.16

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Solution

The fourth proportional to 18,325.53, 25,285.09 and 11,159.16 is: 15,397.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,325.53 : 25,285.09 = 11,159.16 : x
  2. Step 2: Convert to fraction form
    18,325.53/25,285.09 = 11,159.16/x
  3. Step 3: Cross multiply
    18,325.53x = 25,285.09 × 11,159.16
  4. Step 4: Simplify right side
    18,325.53x = 282,160,364.92
  5. Step 5: Solve for x
    x = 282,160,364.92/18,325.53
  6. Step 6: Final answer
    x = 15,397.12

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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.