Home / 7,769.12-11,678.28-6,686.55

Finding the Fourth Proportional to 7,769.12, 11,678.28 and 6,686.55

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Solution

The fourth proportional to 7,769.12, 11,678.28 and 6,686.55 is: 10,051.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,769.12 : 11,678.28 = 6,686.55 : x
  2. Step 2: Convert to fraction form
    7,769.12/11,678.28 = 6,686.55/x
  3. Step 3: Cross multiply
    7,769.12x = 11,678.28 × 6,686.55
  4. Step 4: Simplify right side
    7,769.12x = 78,087,378.06
  5. Step 5: Solve for x
    x = 78,087,378.06/7,769.12
  6. Step 6: Final answer
    x = 10,051.00

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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.