Home / 20,889.27-31,302.50-12,560.18

Finding the Fourth Proportional to 20,889.27, 31,302.50 and 12,560.18

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Solution

The fourth proportional to 20,889.27, 31,302.50 and 12,560.18 is: 18,821.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.27 : 31,302.50 = 12,560.18 : x
  2. Step 2: Convert to fraction form
    20,889.27/31,302.50 = 12,560.18/x
  3. Step 3: Cross multiply
    20,889.27x = 31,302.50 × 12,560.18
  4. Step 4: Simplify right side
    20,889.27x = 393,164,815.14
  5. Step 5: Solve for x
    x = 393,164,815.14/20,889.27
  6. Step 6: Final answer
    x = 18,821.38

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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.