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Finding the Fourth Proportional to 40,980.65, 61,470.77 and 12,903.08

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Solution

The fourth proportional to 40,980.65, 61,470.77 and 12,903.08 is: 19,354.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,980.65 : 61,470.77 = 12,903.08 : x
  2. Step 2: Convert to fraction form
    40,980.65/61,470.77 = 12,903.08/x
  3. Step 3: Cross multiply
    40,980.65x = 61,470.77 × 12,903.08
  4. Step 4: Simplify right side
    40,980.65x = 793,161,891.10
  5. Step 5: Solve for x
    x = 793,161,891.10/40,980.65
  6. Step 6: Final answer
    x = 19,354.55

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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.