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Finding the Fourth Proportional to 52,589.08, 78,840.02 and 20,979.64

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Solution

The fourth proportional to 52,589.08, 78,840.02 and 20,979.64 is: 31,452.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,589.08 : 78,840.02 = 20,979.64 : x
  2. Step 2: Convert to fraction form
    52,589.08/78,840.02 = 20,979.64/x
  3. Step 3: Cross multiply
    52,589.08x = 78,840.02 × 20,979.64
  4. Step 4: Simplify right side
    52,589.08x = 1,654,035,237.19
  5. Step 5: Solve for x
    x = 1,654,035,237.19/52,589.08
  6. Step 6: Final answer
    x = 31,452.07

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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.