Home / 21,276.87-31,899.67-10,191.34

Finding the Fourth Proportional to 21,276.87, 31,899.67 and 10,191.34

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Solution

The fourth proportional to 21,276.87, 31,899.67 and 10,191.34 is: 15,279.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.87 : 31,899.67 = 10,191.34 : x
  2. Step 2: Convert to fraction form
    21,276.87/31,899.67 = 10,191.34/x
  3. Step 3: Cross multiply
    21,276.87x = 31,899.67 × 10,191.34
  4. Step 4: Simplify right side
    21,276.87x = 325,100,382.86
  5. Step 5: Solve for x
    x = 325,100,382.86/21,276.87
  6. Step 6: Final answer
    x = 15,279.52

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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.