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Finding the Fourth Proportional to 8,443.70, 12,665.55 and 2,895.20

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Solution

The fourth proportional to 8,443.70, 12,665.55 and 2,895.20 is: 4,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,443.70 : 12,665.55 = 2,895.20 : x
  2. Step 2: Convert to fraction form
    8,443.70/12,665.55 = 2,895.20/x
  3. Step 3: Cross multiply
    8,443.70x = 12,665.55 × 2,895.20
  4. Step 4: Simplify right side
    8,443.70x = 36,669,300.36
  5. Step 5: Solve for x
    x = 36,669,300.36/8,443.70
  6. Step 6: Final answer
    x = 4,342.80

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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.