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Finding the Fourth Proportional to 51,315.40, 76,980.30 and 16,251.40

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Solution

The fourth proportional to 51,315.40, 76,980.30 and 16,251.40 is: 24,379.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,315.40 : 76,980.30 = 16,251.40 : x
  2. Step 2: Convert to fraction form
    51,315.40/76,980.30 = 16,251.40/x
  3. Step 3: Cross multiply
    51,315.40x = 76,980.30 × 16,251.40
  4. Step 4: Simplify right side
    51,315.40x = 1,251,037,647.42
  5. Step 5: Solve for x
    x = 1,251,037,647.42/51,315.40
  6. Step 6: Final answer
    x = 24,379.38

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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.