Home / 51,776.94-77,680.53-20,616.78

Finding the Fourth Proportional to 51,776.94, 77,680.53 and 20,616.78

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Solution

The fourth proportional to 51,776.94, 77,680.53 and 20,616.78 is: 30,931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,776.94 : 77,680.53 = 20,616.78 : x
  2. Step 2: Convert to fraction form
    51,776.94/77,680.53 = 20,616.78/x
  3. Step 3: Cross multiply
    51,776.94x = 77,680.53 × 20,616.78
  4. Step 4: Simplify right side
    51,776.94x = 1,601,522,397.29
  5. Step 5: Solve for x
    x = 1,601,522,397.29/51,776.94
  6. Step 6: Final answer
    x = 30,931.19

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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.