Home / 28,667.90-43,001.85-13,905.65

Finding the Fourth Proportional to 28,667.90, 43,001.85 and 13,905.65

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Solution

The fourth proportional to 28,667.90, 43,001.85 and 13,905.65 is: 20,858.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,667.90 : 43,001.85 = 13,905.65 : x
  2. Step 2: Convert to fraction form
    28,667.90/43,001.85 = 13,905.65/x
  3. Step 3: Cross multiply
    28,667.90x = 43,001.85 × 13,905.65
  4. Step 4: Simplify right side
    28,667.90x = 597,968,675.45
  5. Step 5: Solve for x
    x = 597,968,675.45/28,667.90
  6. Step 6: Final answer
    x = 20,858.48

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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.