Home / 20,667.51-31,001.40-8,190.54

Finding the Fourth Proportional to 20,667.51, 31,001.40 and 8,190.54

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Solution

The fourth proportional to 20,667.51, 31,001.40 and 8,190.54 is: 12,285.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.51 : 31,001.40 = 8,190.54 : x
  2. Step 2: Convert to fraction form
    20,667.51/31,001.40 = 8,190.54/x
  3. Step 3: Cross multiply
    20,667.51x = 31,001.40 × 8,190.54
  4. Step 4: Simplify right side
    20,667.51x = 253,918,206.76
  5. Step 5: Solve for x
    x = 253,918,206.76/20,667.51
  6. Step 6: Final answer
    x = 12,285.86

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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.