Home / 20,870.66-28,801.61-11,310.57

Finding the Fourth Proportional to 20,870.66, 28,801.61 and 11,310.57

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Solution

The fourth proportional to 20,870.66, 28,801.61 and 11,310.57 is: 15,608.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.66 : 28,801.61 = 11,310.57 : x
  2. Step 2: Convert to fraction form
    20,870.66/28,801.61 = 11,310.57/x
  3. Step 3: Cross multiply
    20,870.66x = 28,801.61 × 11,310.57
  4. Step 4: Simplify right side
    20,870.66x = 325,762,569.46
  5. Step 5: Solve for x
    x = 325,762,569.46/20,870.66
  6. Step 6: Final answer
    x = 15,608.64

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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.