Home / 8,931.21-12,325.41-6,689.13

Finding the Fourth Proportional to 8,931.21, 12,325.41 and 6,689.13

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Solution

The fourth proportional to 8,931.21, 12,325.41 and 6,689.13 is: 9,231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.21 : 12,325.41 = 6,689.13 : x
  2. Step 2: Convert to fraction form
    8,931.21/12,325.41 = 6,689.13/x
  3. Step 3: Cross multiply
    8,931.21x = 12,325.41 × 6,689.13
  4. Step 4: Simplify right side
    8,931.21x = 82,446,269.79
  5. Step 5: Solve for x
    x = 82,446,269.79/8,931.21
  6. Step 6: Final answer
    x = 9,231.25

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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.