Home / 15,712.63-21,683.23-8,638.99

Finding the Fourth Proportional to 15,712.63, 21,683.23 and 8,638.99

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Solution

The fourth proportional to 15,712.63, 21,683.23 and 8,638.99 is: 11,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.63 : 21,683.23 = 8,638.99 : x
  2. Step 2: Convert to fraction form
    15,712.63/21,683.23 = 8,638.99/x
  3. Step 3: Cross multiply
    15,712.63x = 21,683.23 × 8,638.99
  4. Step 4: Simplify right side
    15,712.63x = 187,321,207.14
  5. Step 5: Solve for x
    x = 187,321,207.14/15,712.63
  6. Step 6: Final answer
    x = 11,921.70

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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.