Home / 15,712.11-21,683.07-8,638.92

Finding the Fourth Proportional to 15,712.11, 21,683.07 and 8,638.92

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Solution

The fourth proportional to 15,712.11, 21,683.07 and 8,638.92 is: 11,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.11 : 21,683.07 = 8,638.92 : x
  2. Step 2: Convert to fraction form
    15,712.11/21,683.07 = 8,638.92/x
  3. Step 3: Cross multiply
    15,712.11x = 21,683.07 × 8,638.92
  4. Step 4: Simplify right side
    15,712.11x = 187,318,307.08
  5. Step 5: Solve for x
    x = 187,318,307.08/15,712.11
  6. Step 6: Final answer
    x = 11,921.91

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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.