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Finding the Fourth Proportional to 15,588.50, 21,512.14 and 8,514.90

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Solution

The fourth proportional to 15,588.50, 21,512.14 and 8,514.90 is: 11,750.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588.50 : 21,512.14 = 8,514.90 : x
  2. Step 2: Convert to fraction form
    15,588.50/21,512.14 = 8,514.90/x
  3. Step 3: Cross multiply
    15,588.50x = 21,512.14 × 8,514.90
  4. Step 4: Simplify right side
    15,588.50x = 183,173,720.89
  5. Step 5: Solve for x
    x = 183,173,720.89/15,588.50
  6. Step 6: Final answer
    x = 11,750.57

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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.