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Finding the Fourth Proportional to 40,894, 61,340.90 and 12,816.20

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Solution

The fourth proportional to 40,894, 61,340.90 and 12,816.20 is: 19,224.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,894 : 61,340.90 = 12,816.20 : x
  2. Step 2: Convert to fraction form
    40,894/61,340.90 = 12,816.20/x
  3. Step 3: Cross multiply
    40,894x = 61,340.90 × 12,816.20
  4. Step 4: Simplify right side
    40,894x = 786,157,242.58
  5. Step 5: Solve for x
    x = 786,157,242.58/40,894
  6. Step 6: Final answer
    x = 19,224.27

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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.