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Finding the Fourth Proportional to 8,666.60, 13,000.26 and 7,215.98

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Solution

The fourth proportional to 8,666.60, 13,000.26 and 7,215.98 is: 10,824.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.60 : 13,000.26 = 7,215.98 : x
  2. Step 2: Convert to fraction form
    8,666.60/13,000.26 = 7,215.98/x
  3. Step 3: Cross multiply
    8,666.60x = 13,000.26 × 7,215.98
  4. Step 4: Simplify right side
    8,666.60x = 93,809,616.15
  5. Step 5: Solve for x
    x = 93,809,616.15/8,666.60
  6. Step 6: Final answer
    x = 10,824.27

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1.5x scale

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.