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Finding the Fourth Proportional to 28,614.13, 42,912.99 and 9,889.27

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Solution

The fourth proportional to 28,614.13, 42,912.99 and 9,889.27 is: 14,831.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,614.13 : 42,912.99 = 9,889.27 : x
  2. Step 2: Convert to fraction form
    28,614.13/42,912.99 = 9,889.27/x
  3. Step 3: Cross multiply
    28,614.13x = 42,912.99 × 9,889.27
  4. Step 4: Simplify right side
    28,614.13x = 424,378,144.62
  5. Step 5: Solve for x
    x = 424,378,144.62/28,614.13
  6. Step 6: Final answer
    x = 14,831.07

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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.