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Finding the Fourth Proportional to 51,954.80, 77,939.40 and 18,666.80

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Solution

The fourth proportional to 51,954.80, 77,939.40 and 18,666.80 is: 28,002.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,954.80 : 77,939.40 = 18,666.80 : x
  2. Step 2: Convert to fraction form
    51,954.80/77,939.40 = 18,666.80/x
  3. Step 3: Cross multiply
    51,954.80x = 77,939.40 × 18,666.80
  4. Step 4: Simplify right side
    51,954.80x = 1,454,879,191.92
  5. Step 5: Solve for x
    x = 1,454,879,191.92/51,954.80
  6. Step 6: Final answer
    x = 28,002.79

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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.