Home / 21,077.16-31,603.40-7,930.56

Finding the Fourth Proportional to 21,077.16, 31,603.40 and 7,930.56

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Solution

The fourth proportional to 21,077.16, 31,603.40 and 7,930.56 is: 11,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.16 : 31,603.40 = 7,930.56 : x
  2. Step 2: Convert to fraction form
    21,077.16/31,603.40 = 7,930.56/x
  3. Step 3: Cross multiply
    21,077.16x = 31,603.40 × 7,930.56
  4. Step 4: Simplify right side
    21,077.16x = 250,632,659.90
  5. Step 5: Solve for x
    x = 250,632,659.90/21,077.16
  6. Step 6: Final answer
    x = 11,891.20

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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.