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Finding the Fourth Proportional to 14,988.72, 20,676.12 and 8,700.40

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Solution

The fourth proportional to 14,988.72, 20,676.12 and 8,700.40 is: 12,001.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,988.72 : 20,676.12 = 8,700.40 : x
  2. Step 2: Convert to fraction form
    14,988.72/20,676.12 = 8,700.40/x
  3. Step 3: Cross multiply
    14,988.72x = 20,676.12 × 8,700.40
  4. Step 4: Simplify right side
    14,988.72x = 179,890,514.45
  5. Step 5: Solve for x
    x = 179,890,514.45/14,988.72
  6. Step 6: Final answer
    x = 12,001.73

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.