Home / 21,009.57-31,514.36-5,427.20

Finding the Fourth Proportional to 21,009.57, 31,514.36 and 5,427.20

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Solution

The fourth proportional to 21,009.57, 31,514.36 and 5,427.20 is: 8,140.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.57 : 31,514.36 = 5,427.20 : x
  2. Step 2: Convert to fraction form
    21,009.57/31,514.36 = 5,427.20/x
  3. Step 3: Cross multiply
    21,009.57x = 31,514.36 × 5,427.20
  4. Step 4: Simplify right side
    21,009.57x = 171,034,549.88
  5. Step 5: Solve for x
    x = 171,034,549.88/21,009.57
  6. Step 6: Final answer
    x = 8,140.79

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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.