Home / 38,515.20-57,772.80-21,019.20

Finding the Fourth Proportional to 38,515.20, 57,772.80 and 21,019.20

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Solution

The fourth proportional to 38,515.20, 57,772.80 and 21,019.20 is: 31,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,515.20 : 57,772.80 = 21,019.20 : x
  2. Step 2: Convert to fraction form
    38,515.20/57,772.80 = 21,019.20/x
  3. Step 3: Cross multiply
    38,515.20x = 57,772.80 × 21,019.20
  4. Step 4: Simplify right side
    38,515.20x = 1,214,338,037.76
  5. Step 5: Solve for x
    x = 1,214,338,037.76/38,515.20
  6. Step 6: Final answer
    x = 31,528.80

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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.