Home / 21,114.12-31,670.92-12,404.28

Finding the Fourth Proportional to 21,114.12, 31,670.92 and 12,404.28

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Solution

The fourth proportional to 21,114.12, 31,670.92 and 12,404.28 is: 18,606.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.12 : 31,670.92 = 12,404.28 : x
  2. Step 2: Convert to fraction form
    21,114.12/31,670.92 = 12,404.28/x
  3. Step 3: Cross multiply
    21,114.12x = 31,670.92 × 12,404.28
  4. Step 4: Simplify right side
    21,114.12x = 392,854,959.54
  5. Step 5: Solve for x
    x = 392,854,959.54/21,114.12
  6. Step 6: Final answer
    x = 18,606.27

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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.