Home / 21,249.36-31,874.08-7,398.40

Finding the Fourth Proportional to 21,249.36, 31,874.08 and 7,398.40

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Solution

The fourth proportional to 21,249.36, 31,874.08 and 7,398.40 is: 11,097.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.36 : 31,874.08 = 7,398.40 : x
  2. Step 2: Convert to fraction form
    21,249.36/31,874.08 = 7,398.40/x
  3. Step 3: Cross multiply
    21,249.36x = 31,874.08 × 7,398.40
  4. Step 4: Simplify right side
    21,249.36x = 235,817,193.47
  5. Step 5: Solve for x
    x = 235,817,193.47/21,249.36
  6. Step 6: Final answer
    x = 11,097.61

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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.