Home / 21,559.72-29,750.68-12,129.88

Finding the Fourth Proportional to 21,559.72, 29,750.68 and 12,129.88

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Solution

The fourth proportional to 21,559.72, 29,750.68 and 12,129.88 is: 16,738.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.72 : 29,750.68 = 12,129.88 : x
  2. Step 2: Convert to fraction form
    21,559.72/29,750.68 = 12,129.88/x
  3. Step 3: Cross multiply
    21,559.72x = 29,750.68 × 12,129.88
  4. Step 4: Simplify right side
    21,559.72x = 360,872,178.32
  5. Step 5: Solve for x
    x = 360,872,178.32/21,559.72
  6. Step 6: Final answer
    x = 16,738.26

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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.