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Finding the Fourth Proportional to 7,659.80, 11,412.65 and 7,156.84

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Solution

The fourth proportional to 7,659.80, 11,412.65 and 7,156.84 is: 10,663.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,659.80 : 11,412.65 = 7,156.84 : x
  2. Step 2: Convert to fraction form
    7,659.80/11,412.65 = 7,156.84/x
  3. Step 3: Cross multiply
    7,659.80x = 11,412.65 × 7,156.84
  4. Step 4: Simplify right side
    7,659.80x = 81,678,510.03
  5. Step 5: Solve for x
    x = 81,678,510.03/7,659.80
  6. Step 6: Final answer
    x = 10,663.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.