Home / 15,348.81-21,181.12-8,542.72

Finding the Fourth Proportional to 15,348.81, 21,181.12 and 8,542.72

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Solution

The fourth proportional to 15,348.81, 21,181.12 and 8,542.72 is: 11,788.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,348.81 : 21,181.12 = 8,542.72 : x
  2. Step 2: Convert to fraction form
    15,348.81/21,181.12 = 8,542.72/x
  3. Step 3: Cross multiply
    15,348.81x = 21,181.12 × 8,542.72
  4. Step 4: Simplify right side
    15,348.81x = 180,944,377.45
  5. Step 5: Solve for x
    x = 180,944,377.45/15,348.81
  6. Step 6: Final answer
    x = 11,788.82

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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.