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Finding the Fourth Proportional to 7,726.68, 10,667.16 and 6,978.24

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Solution

The fourth proportional to 7,726.68, 10,667.16 and 6,978.24 is: 9,633.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,726.68 : 10,667.16 = 6,978.24 : x
  2. Step 2: Convert to fraction form
    7,726.68/10,667.16 = 6,978.24/x
  3. Step 3: Cross multiply
    7,726.68x = 10,667.16 × 6,978.24
  4. Step 4: Simplify right side
    7,726.68x = 74,438,002.60
  5. Step 5: Solve for x
    x = 74,438,002.60/7,726.68
  6. Step 6: Final answer
    x = 9,633.89

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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.