Home / 28,138.50-42,207.75-11,507.58

Finding the Fourth Proportional to 28,138.50, 42,207.75 and 11,507.58

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Solution

The fourth proportional to 28,138.50, 42,207.75 and 11,507.58 is: 17,261.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.50 : 42,207.75 = 11,507.58 : x
  2. Step 2: Convert to fraction form
    28,138.50/42,207.75 = 11,507.58/x
  3. Step 3: Cross multiply
    28,138.50x = 42,207.75 × 11,507.58
  4. Step 4: Simplify right side
    28,138.50x = 485,709,059.75
  5. Step 5: Solve for x
    x = 485,709,059.75/28,138.50
  6. Step 6: Final answer
    x = 17,261.37

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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.