Home / 13,947.20-20,920.80-8,756.72

Finding the Fourth Proportional to 13,947.20, 20,920.80 and 8,756.72

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Solution

The fourth proportional to 13,947.20, 20,920.80 and 8,756.72 is: 13,135.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.20 : 20,920.80 = 8,756.72 : x
  2. Step 2: Convert to fraction form
    13,947.20/20,920.80 = 8,756.72/x
  3. Step 3: Cross multiply
    13,947.20x = 20,920.80 × 8,756.72
  4. Step 4: Simplify right side
    13,947.20x = 183,197,483.17
  5. Step 5: Solve for x
    x = 183,197,483.17/13,947.20
  6. Step 6: Final answer
    x = 13,135.08

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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.