Home / 20,802.20-31,174.12-10,921.50

Finding the Fourth Proportional to 20,802.20, 31,174.12 and 10,921.50

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Solution

The fourth proportional to 20,802.20, 31,174.12 and 10,921.50 is: 16,366.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.20 : 31,174.12 = 10,921.50 : x
  2. Step 2: Convert to fraction form
    20,802.20/31,174.12 = 10,921.50/x
  3. Step 3: Cross multiply
    20,802.20x = 31,174.12 × 10,921.50
  4. Step 4: Simplify right side
    20,802.20x = 340,468,151.58
  5. Step 5: Solve for x
    x = 340,468,151.58/20,802.20
  6. Step 6: Final answer
    x = 16,366.93

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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.