Home / 20,870.73-28,801.53-11,310.65

Finding the Fourth Proportional to 20,870.73, 28,801.53 and 11,310.65

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Solution

The fourth proportional to 20,870.73, 28,801.53 and 11,310.65 is: 15,608.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.73 : 28,801.53 = 11,310.65 : x
  2. Step 2: Convert to fraction form
    20,870.73/28,801.53 = 11,310.65/x
  3. Step 3: Cross multiply
    20,870.73x = 28,801.53 × 11,310.65
  4. Step 4: Simplify right side
    20,870.73x = 325,763,989.29
  5. Step 5: Solve for x
    x = 325,763,989.29/20,870.73
  6. Step 6: Final answer
    x = 15,608.65

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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.