Home / 12,405.30-17,115.75-7,684.62

Finding the Fourth Proportional to 12,405.30, 17,115.75 and 7,684.62

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Solution

The fourth proportional to 12,405.30, 17,115.75 and 7,684.62 is: 10,602.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.30 : 17,115.75 = 7,684.62 : x
  2. Step 2: Convert to fraction form
    12,405.30/17,115.75 = 7,684.62/x
  3. Step 3: Cross multiply
    12,405.30x = 17,115.75 × 7,684.62
  4. Step 4: Simplify right side
    12,405.30x = 131,528,034.77
  5. Step 5: Solve for x
    x = 131,528,034.77/12,405.30
  6. Step 6: Final answer
    x = 10,602.57

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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.