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Finding the Fourth Proportional to 9,140.68, 12,639 and 8,992.48

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Solution

The fourth proportional to 9,140.68, 12,639 and 8,992.48 is: 12,434.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.68 : 12,639 = 8,992.48 : x
  2. Step 2: Convert to fraction form
    9,140.68/12,639 = 8,992.48/x
  3. Step 3: Cross multiply
    9,140.68x = 12,639 × 8,992.48
  4. Step 4: Simplify right side
    9,140.68x = 113,655,954.72
  5. Step 5: Solve for x
    x = 113,655,954.72/9,140.68
  6. Step 6: Final answer
    x = 12,434.08

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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.