Home / 20,959.76-31,294.18-18,860.24

Finding the Fourth Proportional to 20,959.76, 31,294.18 and 18,860.24

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Solution

The fourth proportional to 20,959.76, 31,294.18 and 18,860.24 is: 28,159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.76 : 31,294.18 = 18,860.24 : x
  2. Step 2: Convert to fraction form
    20,959.76/31,294.18 = 18,860.24/x
  3. Step 3: Cross multiply
    20,959.76x = 31,294.18 × 18,860.24
  4. Step 4: Simplify right side
    20,959.76x = 590,215,745.40
  5. Step 5: Solve for x
    x = 590,215,745.40/20,959.76
  6. Step 6: Final answer
    x = 28,159.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.