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Finding the Fourth Proportional to 15,203.01, 20,985.17 and 8,915.25

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Solution

The fourth proportional to 15,203.01, 20,985.17 and 8,915.25 is: 12,305.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.01 : 20,985.17 = 8,915.25 : x
  2. Step 2: Convert to fraction form
    15,203.01/20,985.17 = 8,915.25/x
  3. Step 3: Cross multiply
    15,203.01x = 20,985.17 × 8,915.25
  4. Step 4: Simplify right side
    15,203.01x = 187,087,992.27
  5. Step 5: Solve for x
    x = 187,087,992.27/15,203.01
  6. Step 6: Final answer
    x = 12,305.98

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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.