Home / 9,137.27-12,618.14-8,639.72

Finding the Fourth Proportional to 9,137.27, 12,618.14 and 8,639.72

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Solution

The fourth proportional to 9,137.27, 12,618.14 and 8,639.72 is: 11,931.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,137.27 : 12,618.14 = 8,639.72 : x
  2. Step 2: Convert to fraction form
    9,137.27/12,618.14 = 8,639.72/x
  3. Step 3: Cross multiply
    9,137.27x = 12,618.14 × 8,639.72
  4. Step 4: Simplify right side
    9,137.27x = 109,017,090.23
  5. Step 5: Solve for x
    x = 109,017,090.23/9,137.27
  6. Step 6: Final answer
    x = 11,931.04

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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.