Home / 20,929.98-31,395.23-6,139.20

Finding the Fourth Proportional to 20,929.98, 31,395.23 and 6,139.20

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Solution

The fourth proportional to 20,929.98, 31,395.23 and 6,139.20 is: 9,208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.98 : 31,395.23 = 6,139.20 : x
  2. Step 2: Convert to fraction form
    20,929.98/31,395.23 = 6,139.20/x
  3. Step 3: Cross multiply
    20,929.98x = 31,395.23 × 6,139.20
  4. Step 4: Simplify right side
    20,929.98x = 192,741,565.32
  5. Step 5: Solve for x
    x = 192,741,565.32/20,929.98
  6. Step 6: Final answer
    x = 9,208.87

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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.