Home / 51,412.80-77,138.40-20,269.76

Finding the Fourth Proportional to 51,412.80, 77,138.40 and 20,269.76

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Solution

The fourth proportional to 51,412.80, 77,138.40 and 20,269.76 is: 30,412.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,412.80 : 77,138.40 = 20,269.76 : x
  2. Step 2: Convert to fraction form
    51,412.80/77,138.40 = 20,269.76/x
  3. Step 3: Cross multiply
    51,412.80x = 77,138.40 × 20,269.76
  4. Step 4: Simplify right side
    51,412.80x = 1,563,576,854.78
  5. Step 5: Solve for x
    x = 1,563,576,854.78/51,412.80
  6. Step 6: Final answer
    x = 30,412.21

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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.