Home / 28,382.38-39,168.89-15,807.13

Finding the Fourth Proportional to 28,382.38, 39,168.89 and 15,807.13

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Solution

The fourth proportional to 28,382.38, 39,168.89 and 15,807.13 is: 21,814.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.38 : 39,168.89 = 15,807.13 : x
  2. Step 2: Convert to fraction form
    28,382.38/39,168.89 = 15,807.13/x
  3. Step 3: Cross multiply
    28,382.38x = 39,168.89 × 15,807.13
  4. Step 4: Simplify right side
    28,382.38x = 619,147,736.19
  5. Step 5: Solve for x
    x = 619,147,736.19/28,382.38
  6. Step 6: Final answer
    x = 21,814.51

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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.