Home / 20,749.21-31,116.17-7,418.60

Finding the Fourth Proportional to 20,749.21, 31,116.17 and 7,418.60

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Solution

The fourth proportional to 20,749.21, 31,116.17 and 7,418.60 is: 11,125.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.21 : 31,116.17 = 7,418.60 : x
  2. Step 2: Convert to fraction form
    20,749.21/31,116.17 = 7,418.60/x
  3. Step 3: Cross multiply
    20,749.21x = 31,116.17 × 7,418.60
  4. Step 4: Simplify right side
    20,749.21x = 230,838,531.71
  5. Step 5: Solve for x
    x = 230,838,531.71/20,749.21
  6. Step 6: Final answer
    x = 11,125.17

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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.