Home / 12,403.20-17,109.63-7,857.57

Finding the Fourth Proportional to 12,403.20, 17,109.63 and 7,857.57

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Solution

The fourth proportional to 12,403.20, 17,109.63 and 7,857.57 is: 10,839.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.20 : 17,109.63 = 7,857.57 : x
  2. Step 2: Convert to fraction form
    12,403.20/17,109.63 = 7,857.57/x
  3. Step 3: Cross multiply
    12,403.20x = 17,109.63 × 7,857.57
  4. Step 4: Simplify right side
    12,403.20x = 134,440,115.40
  5. Step 5: Solve for x
    x = 134,440,115.40/12,403.20
  6. Step 6: Final answer
    x = 10,839.15

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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.