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Finding the Fourth Proportional to 21,363.68, 32,009.88 and 18,914.24

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Solution

The fourth proportional to 21,363.68, 32,009.88 and 18,914.24 is: 28,339.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.68 : 32,009.88 = 18,914.24 : x
  2. Step 2: Convert to fraction form
    21,363.68/32,009.88 = 18,914.24/x
  3. Step 3: Cross multiply
    21,363.68x = 32,009.88 × 18,914.24
  4. Step 4: Simplify right side
    21,363.68x = 605,442,552.69
  5. Step 5: Solve for x
    x = 605,442,552.69/21,363.68
  6. Step 6: Final answer
    x = 28,339.81

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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.