Home / 40,986.64-61,479.76-12,909.08

Finding the Fourth Proportional to 40,986.64, 61,479.76 and 12,909.08

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Solution

The fourth proportional to 40,986.64, 61,479.76 and 12,909.08 is: 19,363.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,986.64 : 61,479.76 = 12,909.08 : x
  2. Step 2: Convert to fraction form
    40,986.64/61,479.76 = 12,909.08/x
  3. Step 3: Cross multiply
    40,986.64x = 61,479.76 × 12,909.08
  4. Step 4: Simplify right side
    40,986.64x = 793,647,140.22
  5. Step 5: Solve for x
    x = 793,647,140.22/40,986.64
  6. Step 6: Final answer
    x = 19,363.56

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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.