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Finding the Fourth Proportional to 7,685.51, 10,610.52 and 7,242.65

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Solution

The fourth proportional to 7,685.51, 10,610.52 and 7,242.65 is: 9,999.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,685.51 : 10,610.52 = 7,242.65 : x
  2. Step 2: Convert to fraction form
    7,685.51/10,610.52 = 7,242.65/x
  3. Step 3: Cross multiply
    7,685.51x = 10,610.52 × 7,242.65
  4. Step 4: Simplify right side
    7,685.51x = 76,848,229.63
  5. Step 5: Solve for x
    x = 76,848,229.63/7,685.51
  6. Step 6: Final answer
    x = 9,999.11

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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.