Home / 28,515.60-42,797.70-12,744.90

Finding the Fourth Proportional to 28,515.60, 42,797.70 and 12,744.90

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Solution

The fourth proportional to 28,515.60, 42,797.70 and 12,744.90 is: 19,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.60 : 42,797.70 = 12,744.90 : x
  2. Step 2: Convert to fraction form
    28,515.60/42,797.70 = 12,744.90/x
  3. Step 3: Cross multiply
    28,515.60x = 42,797.70 × 12,744.90
  4. Step 4: Simplify right side
    28,515.60x = 545,452,406.73
  5. Step 5: Solve for x
    x = 545,452,406.73/28,515.60
  6. Step 6: Final answer
    x = 19,128.21

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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.