Home / 21,251.20-31,876.80-5,670.40

Finding the Fourth Proportional to 21,251.20, 31,876.80 and 5,670.40

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Solution

The fourth proportional to 21,251.20, 31,876.80 and 5,670.40 is: 8,505.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.20 : 31,876.80 = 5,670.40 : x
  2. Step 2: Convert to fraction form
    21,251.20/31,876.80 = 5,670.40/x
  3. Step 3: Cross multiply
    21,251.20x = 31,876.80 × 5,670.40
  4. Step 4: Simplify right side
    21,251.20x = 180,754,206.72
  5. Step 5: Solve for x
    x = 180,754,206.72/21,251.20
  6. Step 6: Final answer
    x = 8,505.60

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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.