Home / 20,961.54-31,442.28-5,379.17

Finding the Fourth Proportional to 20,961.54, 31,442.28 and 5,379.17

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Solution

The fourth proportional to 20,961.54, 31,442.28 and 5,379.17 is: 8,068.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.54 : 31,442.28 = 5,379.17 : x
  2. Step 2: Convert to fraction form
    20,961.54/31,442.28 = 5,379.17/x
  3. Step 3: Cross multiply
    20,961.54x = 31,442.28 × 5,379.17
  4. Step 4: Simplify right side
    20,961.54x = 169,133,212.10
  5. Step 5: Solve for x
    x = 169,133,212.10/20,961.54
  6. Step 6: Final answer
    x = 8,068.74

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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.