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Finding the Fourth Proportional to 8,666.70, 11,957.67 and 5,520.30

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Solution

The fourth proportional to 8,666.70, 11,957.67 and 5,520.30 is: 7,616.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.70 : 11,957.67 = 5,520.30 : x
  2. Step 2: Convert to fraction form
    8,666.70/11,957.67 = 5,520.30/x
  3. Step 3: Cross multiply
    8,666.70x = 11,957.67 × 5,520.30
  4. Step 4: Simplify right side
    8,666.70x = 66,009,925.70
  5. Step 5: Solve for x
    x = 66,009,925.70/8,666.70
  6. Step 6: Final answer
    x = 7,616.50

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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.