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Finding the Fourth Proportional to 51,987.01, 77,980.52 and 20,411.96

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Solution

The fourth proportional to 51,987.01, 77,980.52 and 20,411.96 is: 30,617.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,987.01 : 77,980.52 = 20,411.96 : x
  2. Step 2: Convert to fraction form
    51,987.01/77,980.52 = 20,411.96/x
  3. Step 3: Cross multiply
    51,987.01x = 77,980.52 × 20,411.96
  4. Step 4: Simplify right side
    51,987.01x = 1,591,735,255.02
  5. Step 5: Solve for x
    x = 1,591,735,255.02/51,987.01
  6. Step 6: Final answer
    x = 30,617.94

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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.