Home / 21,559.20-29,749.59-12,127.56

Finding the Fourth Proportional to 21,559.20, 29,749.59 and 12,127.56

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Solution

The fourth proportional to 21,559.20, 29,749.59 and 12,127.56 is: 16,734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.20 : 29,749.59 = 12,127.56 : x
  2. Step 2: Convert to fraction form
    21,559.20/29,749.59 = 12,127.56/x
  3. Step 3: Cross multiply
    21,559.20x = 29,749.59 × 12,127.56
  4. Step 4: Simplify right side
    21,559.20x = 360,789,937.70
  5. Step 5: Solve for x
    x = 360,789,937.70/21,559.20
  6. Step 6: Final answer
    x = 16,734.85

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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.