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Finding the Fourth Proportional to 8,705.99, 12,020.49 and 5,353.29

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Solution

The fourth proportional to 8,705.99, 12,020.49 and 5,353.29 is: 7,391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.99 : 12,020.49 = 5,353.29 : x
  2. Step 2: Convert to fraction form
    8,705.99/12,020.49 = 5,353.29/x
  3. Step 3: Cross multiply
    8,705.99x = 12,020.49 × 5,353.29
  4. Step 4: Simplify right side
    8,705.99x = 64,349,168.91
  5. Step 5: Solve for x
    x = 64,349,168.91/8,705.99
  6. Step 6: Final answer
    x = 7,391.37

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Half scale
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Double scale
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Similar ratio
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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.