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Finding the Fourth Proportional to 18,111.70, 25,382.30 and 18,111.70

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Solution

The fourth proportional to 18,111.70, 25,382.30 and 18,111.70 is: 25,382.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,111.70 : 25,382.30 = 18,111.70 : x
  2. Step 2: Convert to fraction form
    18,111.70/25,382.30 = 18,111.70/x
  3. Step 3: Cross multiply
    18,111.70x = 25,382.30 × 18,111.70
  4. Step 4: Simplify right side
    18,111.70x = 459,716,602.91
  5. Step 5: Solve for x
    x = 459,716,602.91/18,111.70
  6. Step 6: Final answer
    x = 25,382.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.