Home / 21,207.12-31,815.48-11,341.20

Finding the Fourth Proportional to 21,207.12, 31,815.48 and 11,341.20

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Solution

The fourth proportional to 21,207.12, 31,815.48 and 11,341.20 is: 17,014.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.12 : 31,815.48 = 11,341.20 : x
  2. Step 2: Convert to fraction form
    21,207.12/31,815.48 = 11,341.20/x
  3. Step 3: Cross multiply
    21,207.12x = 31,815.48 × 11,341.20
  4. Step 4: Simplify right side
    21,207.12x = 360,825,721.78
  5. Step 5: Solve for x
    x = 360,825,721.78/21,207.12
  6. Step 6: Final answer
    x = 17,014.37

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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.