Home / 51,855.10-77,821.05-20,712.70

Finding the Fourth Proportional to 51,855.10, 77,821.05 and 20,712.70

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Solution

The fourth proportional to 51,855.10, 77,821.05 and 20,712.70 is: 31,084.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,855.10 : 77,821.05 = 20,712.70 : x
  2. Step 2: Convert to fraction form
    51,855.10/77,821.05 = 20,712.70/x
  3. Step 3: Cross multiply
    51,855.10x = 77,821.05 × 20,712.70
  4. Step 4: Simplify right side
    51,855.10x = 1,611,884,062.34
  5. Step 5: Solve for x
    x = 1,611,884,062.34/51,855.10
  6. Step 6: Final answer
    x = 31,084.39

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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.