Home / 28,857.20-43,285.80-13,305.20

Finding the Fourth Proportional to 28,857.20, 43,285.80 and 13,305.20

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Solution

The fourth proportional to 28,857.20, 43,285.80 and 13,305.20 is: 19,957.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.20 : 43,285.80 = 13,305.20 : x
  2. Step 2: Convert to fraction form
    28,857.20/43,285.80 = 13,305.20/x
  3. Step 3: Cross multiply
    28,857.20x = 43,285.80 × 13,305.20
  4. Step 4: Simplify right side
    28,857.20x = 575,926,226.16
  5. Step 5: Solve for x
    x = 575,926,226.16/28,857.20
  6. Step 6: Final answer
    x = 19,957.80

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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.