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Finding the Fourth Proportional to 22,419.68, 30,937.04 and 12,988.80

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Solution

The fourth proportional to 22,419.68, 30,937.04 and 12,988.80 is: 17,923.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,419.68 : 30,937.04 = 12,988.80 : x
  2. Step 2: Convert to fraction form
    22,419.68/30,937.04 = 12,988.80/x
  3. Step 3: Cross multiply
    22,419.68x = 30,937.04 × 12,988.80
  4. Step 4: Simplify right side
    22,419.68x = 401,835,025.15
  5. Step 5: Solve for x
    x = 401,835,025.15/22,419.68
  6. Step 6: Final answer
    x = 17,923.32

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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.