Home / 21,132.59-31,671.41-8,638.34

Finding the Fourth Proportional to 21,132.59, 31,671.41 and 8,638.34

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Solution

The fourth proportional to 21,132.59, 31,671.41 and 8,638.34 is: 12,946.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.59 : 31,671.41 = 8,638.34 : x
  2. Step 2: Convert to fraction form
    21,132.59/31,671.41 = 8,638.34/x
  3. Step 3: Cross multiply
    21,132.59x = 31,671.41 × 8,638.34
  4. Step 4: Simplify right side
    21,132.59x = 273,588,206.31
  5. Step 5: Solve for x
    x = 273,588,206.31/21,132.59
  6. Step 6: Final answer
    x = 12,946.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.