Home / 20,947.36-31,408.08-12,177.76

Finding the Fourth Proportional to 20,947.36, 31,408.08 and 12,177.76

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Solution

The fourth proportional to 20,947.36, 31,408.08 and 12,177.76 is: 18,259.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.36 : 31,408.08 = 12,177.76 : x
  2. Step 2: Convert to fraction form
    20,947.36/31,408.08 = 12,177.76/x
  3. Step 3: Cross multiply
    20,947.36x = 31,408.08 × 12,177.76
  4. Step 4: Simplify right side
    20,947.36x = 382,480,060.30
  5. Step 5: Solve for x
    x = 382,480,060.30/20,947.36
  6. Step 6: Final answer
    x = 18,259.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.