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Finding the Fourth Proportional to 14,645.88, 20,211.48 and 8,675.28

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Solution

The fourth proportional to 14,645.88, 20,211.48 and 8,675.28 is: 11,971.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,645.88 : 20,211.48 = 8,675.28 : x
  2. Step 2: Convert to fraction form
    14,645.88/20,211.48 = 8,675.28/x
  3. Step 3: Cross multiply
    14,645.88x = 20,211.48 × 8,675.28
  4. Step 4: Simplify right side
    14,645.88x = 175,340,248.21
  5. Step 5: Solve for x
    x = 175,340,248.21/14,645.88
  6. Step 6: Final answer
    x = 11,971.98

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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.