Home / 20,930.62-28,888.50-12,860.60

Finding the Fourth Proportional to 20,930.62, 28,888.50 and 12,860.60

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Solution

The fourth proportional to 20,930.62, 28,888.50 and 12,860.60 is: 17,750.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.62 : 28,888.50 = 12,860.60 : x
  2. Step 2: Convert to fraction form
    20,930.62/28,888.50 = 12,860.60/x
  3. Step 3: Cross multiply
    20,930.62x = 28,888.50 × 12,860.60
  4. Step 4: Simplify right side
    20,930.62x = 371,523,443.10
  5. Step 5: Solve for x
    x = 371,523,443.10/20,930.62
  6. Step 6: Final answer
    x = 17,750.24

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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.