Home / 10,307.90-15,449.70-7,707.80

Finding the Fourth Proportional to 10,307.90, 15,449.70 and 7,707.80

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Solution

The fourth proportional to 10,307.90, 15,449.70 and 7,707.80 is: 11,552.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,307.90 : 15,449.70 = 7,707.80 : x
  2. Step 2: Convert to fraction form
    10,307.90/15,449.70 = 7,707.80/x
  3. Step 3: Cross multiply
    10,307.90x = 15,449.70 × 7,707.80
  4. Step 4: Simplify right side
    10,307.90x = 119,083,197.66
  5. Step 5: Solve for x
    x = 119,083,197.66/10,307.90
  6. Step 6: Final answer
    x = 11,552.61

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1.5x scale

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.