Home / 20,707.72-28,576.70-11,276.89

Finding the Fourth Proportional to 20,707.72, 28,576.70 and 11,276.89

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Solution

The fourth proportional to 20,707.72, 28,576.70 and 11,276.89 is: 15,562.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.72 : 28,576.70 = 11,276.89 : x
  2. Step 2: Convert to fraction form
    20,707.72/28,576.70 = 11,276.89/x
  3. Step 3: Cross multiply
    20,707.72x = 28,576.70 × 11,276.89
  4. Step 4: Simplify right side
    20,707.72x = 322,256,216.93
  5. Step 5: Solve for x
    x = 322,256,216.93/20,707.72
  6. Step 6: Final answer
    x = 15,562.13

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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.