Home / 51,405.40-77,136.90-21,818.20

Finding the Fourth Proportional to 51,405.40, 77,136.90 and 21,818.20

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Solution

The fourth proportional to 51,405.40, 77,136.90 and 21,818.20 is: 32,739.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,405.40 : 77,136.90 = 21,818.20 : x
  2. Step 2: Convert to fraction form
    51,405.40/77,136.90 = 21,818.20/x
  3. Step 3: Cross multiply
    51,405.40x = 77,136.90 × 21,818.20
  4. Step 4: Simplify right side
    51,405.40x = 1,682,988,311.58
  5. Step 5: Solve for x
    x = 1,682,988,311.58/51,405.40
  6. Step 6: Final answer
    x = 32,739.52

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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.