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Finding the Fourth Proportional to 9,415.68, 12,994.02 and 5,167.11

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Solution

The fourth proportional to 9,415.68, 12,994.02 and 5,167.11 is: 7,130.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.68 : 12,994.02 = 5,167.11 : x
  2. Step 2: Convert to fraction form
    9,415.68/12,994.02 = 5,167.11/x
  3. Step 3: Cross multiply
    9,415.68x = 12,994.02 × 5,167.11
  4. Step 4: Simplify right side
    9,415.68x = 67,141,530.68
  5. Step 5: Solve for x
    x = 67,141,530.68/9,415.68
  6. Step 6: Final answer
    x = 7,130.82

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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.