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Finding the Fourth Proportional to 18,866.88, 28,287.90 and 10,559.16

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Solution

The fourth proportional to 18,866.88, 28,287.90 and 10,559.16 is: 15,831.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.88 : 28,287.90 = 10,559.16 : x
  2. Step 2: Convert to fraction form
    18,866.88/28,287.90 = 10,559.16/x
  3. Step 3: Cross multiply
    18,866.88x = 28,287.90 × 10,559.16
  4. Step 4: Simplify right side
    18,866.88x = 298,696,462.16
  5. Step 5: Solve for x
    x = 298,696,462.16/18,866.88
  6. Step 6: Final answer
    x = 15,831.79

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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.