Home / 21,272.30-29,357.47-12,319.96

Finding the Fourth Proportional to 21,272.30, 29,357.47 and 12,319.96

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Solution

The fourth proportional to 21,272.30, 29,357.47 and 12,319.96 is: 17,002.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.30 : 29,357.47 = 12,319.96 : x
  2. Step 2: Convert to fraction form
    21,272.30/29,357.47 = 12,319.96/x
  3. Step 3: Cross multiply
    21,272.30x = 29,357.47 × 12,319.96
  4. Step 4: Simplify right side
    21,272.30x = 361,682,856.10
  5. Step 5: Solve for x
    x = 361,682,856.10/21,272.30
  6. Step 6: Final answer
    x = 17,002.53

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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.