Home / 21,279.57-31,919.36-21,248.82

Finding the Fourth Proportional to 21,279.57, 31,919.36 and 21,248.82

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Solution

The fourth proportional to 21,279.57, 31,919.36 and 21,248.82 is: 31,873.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.57 : 31,919.36 = 21,248.82 : x
  2. Step 2: Convert to fraction form
    21,279.57/31,919.36 = 21,248.82/x
  3. Step 3: Cross multiply
    21,279.57x = 31,919.36 × 21,248.82
  4. Step 4: Simplify right side
    21,279.57x = 678,248,628.91
  5. Step 5: Solve for x
    x = 678,248,628.91/21,279.57
  6. Step 6: Final answer
    x = 31,873.24

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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.