Home / 15,138.35-20,891.41-9,471.28

Finding the Fourth Proportional to 15,138.35, 20,891.41 and 9,471.28

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Solution

The fourth proportional to 15,138.35, 20,891.41 and 9,471.28 is: 13,070.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.35 : 20,891.41 = 9,471.28 : x
  2. Step 2: Convert to fraction form
    15,138.35/20,891.41 = 9,471.28/x
  3. Step 3: Cross multiply
    15,138.35x = 20,891.41 × 9,471.28
  4. Step 4: Simplify right side
    15,138.35x = 197,868,393.70
  5. Step 5: Solve for x
    x = 197,868,393.70/15,138.35
  6. Step 6: Final answer
    x = 13,070.67

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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.