Home / 15,410.78-21,230.84-12,749.92

Finding the Fourth Proportional to 15,410.78, 21,230.84 and 12,749.92

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Solution

The fourth proportional to 15,410.78, 21,230.84 and 12,749.92 is: 17,565.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,410.78 : 21,230.84 = 12,749.92 : x
  2. Step 2: Convert to fraction form
    15,410.78/21,230.84 = 12,749.92/x
  3. Step 3: Cross multiply
    15,410.78x = 21,230.84 × 12,749.92
  4. Step 4: Simplify right side
    15,410.78x = 270,691,511.53
  5. Step 5: Solve for x
    x = 270,691,511.53/15,410.78
  6. Step 6: Final answer
    x = 17,565.08

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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.