Home / 20,294-28,006.80-11,913.20

Finding the Fourth Proportional to 20,294, 28,006.80 and 11,913.20

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Solution

The fourth proportional to 20,294, 28,006.80 and 11,913.20 is: 16,440.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,294 : 28,006.80 = 11,913.20 : x
  2. Step 2: Convert to fraction form
    20,294/28,006.80 = 11,913.20/x
  3. Step 3: Cross multiply
    20,294x = 28,006.80 × 11,913.20
  4. Step 4: Simplify right side
    20,294x = 333,650,609.76
  5. Step 5: Solve for x
    x = 333,650,609.76/20,294
  6. Step 6: Final answer
    x = 16,440.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.