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Finding the Fourth Proportional to 28,614.86, 42,921.36 and 8,624.46

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Solution

The fourth proportional to 28,614.86, 42,921.36 and 8,624.46 is: 12,936.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,614.86 : 42,921.36 = 8,624.46 : x
  2. Step 2: Convert to fraction form
    28,614.86/42,921.36 = 8,624.46/x
  3. Step 3: Cross multiply
    28,614.86x = 42,921.36 × 8,624.46
  4. Step 4: Simplify right side
    28,614.86x = 370,173,552.47
  5. Step 5: Solve for x
    x = 370,173,552.47/28,614.86
  6. Step 6: Final answer
    x = 12,936.41

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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.