Home / 13,938.40-20,908.48-4,077.76

Finding the Fourth Proportional to 13,938.40, 20,908.48 and 4,077.76

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Solution

The fourth proportional to 13,938.40, 20,908.48 and 4,077.76 is: 6,116.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.40 : 20,908.48 = 4,077.76 : x
  2. Step 2: Convert to fraction form
    13,938.40/20,908.48 = 4,077.76/x
  3. Step 3: Cross multiply
    13,938.40x = 20,908.48 × 4,077.76
  4. Step 4: Simplify right side
    13,938.40x = 85,259,763.40
  5. Step 5: Solve for x
    x = 85,259,763.40/13,938.40
  6. Step 6: Final answer
    x = 6,116.90

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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.