Home / 15,740.96-21,721.76-8,667.20

Finding the Fourth Proportional to 15,740.96, 21,721.76 and 8,667.20

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Solution

The fourth proportional to 15,740.96, 21,721.76 and 8,667.20 is: 11,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.96 : 21,721.76 = 8,667.20 : x
  2. Step 2: Convert to fraction form
    15,740.96/21,721.76 = 8,667.20/x
  3. Step 3: Cross multiply
    15,740.96x = 21,721.76 × 8,667.20
  4. Step 4: Simplify right side
    15,740.96x = 188,266,838.27
  5. Step 5: Solve for x
    x = 188,266,838.27/15,740.96
  6. Step 6: Final answer
    x = 11,960.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.