Home / 18,382.68-25,368.12-9,999.18

Finding the Fourth Proportional to 18,382.68, 25,368.12 and 9,999.18

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Solution

The fourth proportional to 18,382.68, 25,368.12 and 9,999.18 is: 13,798.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,382.68 : 25,368.12 = 9,999.18 : x
  2. Step 2: Convert to fraction form
    18,382.68/25,368.12 = 9,999.18/x
  3. Step 3: Cross multiply
    18,382.68x = 25,368.12 × 9,999.18
  4. Step 4: Simplify right side
    18,382.68x = 253,660,398.14
  5. Step 5: Solve for x
    x = 253,660,398.14/18,382.68
  6. Step 6: Final answer
    x = 13,798.88

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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.