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Finding the Fourth Proportional to 8,666.44, 12,972.70 and 4,707.80

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Solution

The fourth proportional to 8,666.44, 12,972.70 and 4,707.80 is: 7,047.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.44 : 12,972.70 = 4,707.80 : x
  2. Step 2: Convert to fraction form
    8,666.44/12,972.70 = 4,707.80/x
  3. Step 3: Cross multiply
    8,666.44x = 12,972.70 × 4,707.80
  4. Step 4: Simplify right side
    8,666.44x = 61,072,877.06
  5. Step 5: Solve for x
    x = 61,072,877.06/8,666.44
  6. Step 6: Final answer
    x = 7,047.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.