Home / 13,947.71-20,885.85-7,700.79

Finding the Fourth Proportional to 13,947.71, 20,885.85 and 7,700.79

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Solution

The fourth proportional to 13,947.71, 20,885.85 and 7,700.79 is: 11,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.71 : 20,885.85 = 7,700.79 : x
  2. Step 2: Convert to fraction form
    13,947.71/20,885.85 = 7,700.79/x
  3. Step 3: Cross multiply
    13,947.71x = 20,885.85 × 7,700.79
  4. Step 4: Simplify right side
    13,947.71x = 160,837,505.66
  5. Step 5: Solve for x
    x = 160,837,505.66/13,947.71
  6. Step 6: Final answer
    x = 11,531.46

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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.