Home / 20,904.60-31,356.51-8,424.29

Finding the Fourth Proportional to 20,904.60, 31,356.51 and 8,424.29

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Solution

The fourth proportional to 20,904.60, 31,356.51 and 8,424.29 is: 12,636.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.60 : 31,356.51 = 8,424.29 : x
  2. Step 2: Convert to fraction form
    20,904.60/31,356.51 = 8,424.29/x
  3. Step 3: Cross multiply
    20,904.60x = 31,356.51 × 8,424.29
  4. Step 4: Simplify right side
    20,904.60x = 264,156,176.85
  5. Step 5: Solve for x
    x = 264,156,176.85/20,904.60
  6. Step 6: Final answer
    x = 12,636.27

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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.