Home / 12,845.90-17,720.10-7,539.71

Finding the Fourth Proportional to 12,845.90, 17,720.10 and 7,539.71

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Solution

The fourth proportional to 12,845.90, 17,720.10 and 7,539.71 is: 10,400.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.90 : 17,720.10 = 7,539.71 : x
  2. Step 2: Convert to fraction form
    12,845.90/17,720.10 = 7,539.71/x
  3. Step 3: Cross multiply
    12,845.90x = 17,720.10 × 7,539.71
  4. Step 4: Simplify right side
    12,845.90x = 133,604,326.57
  5. Step 5: Solve for x
    x = 133,604,326.57/12,845.90
  6. Step 6: Final answer
    x = 10,400.55

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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.