Home / 5,238.12-7,857.20-1,342.40

Finding the Fourth Proportional to 5,238.12, 7,857.20 and 1,342.40

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Solution

The fourth proportional to 5,238.12, 7,857.20 and 1,342.40 is: 2,013.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,238.12 : 7,857.20 = 1,342.40 : x
  2. Step 2: Convert to fraction form
    5,238.12/7,857.20 = 1,342.40/x
  3. Step 3: Cross multiply
    5,238.12x = 7,857.20 × 1,342.40
  4. Step 4: Simplify right side
    5,238.12x = 10,547,505.28
  5. Step 5: Solve for x
    x = 10,547,505.28/5,238.12
  6. Step 6: Final answer
    x = 2,013.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.