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Finding the Fourth Proportional to 9,170.66, 12,655.66 and 4,978.92

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Solution

The fourth proportional to 9,170.66, 12,655.66 and 4,978.92 is: 6,870.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,170.66 : 12,655.66 = 4,978.92 : x
  2. Step 2: Convert to fraction form
    9,170.66/12,655.66 = 4,978.92/x
  3. Step 3: Cross multiply
    9,170.66x = 12,655.66 × 4,978.92
  4. Step 4: Simplify right side
    9,170.66x = 63,011,518.69
  5. Step 5: Solve for x
    x = 63,011,518.69/9,170.66
  6. Step 6: Final answer
    x = 6,870.99

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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.