Home / 12,121.23-16,720.05-7,397.31

Finding the Fourth Proportional to 12,121.23, 16,720.05 and 7,397.31

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Solution

The fourth proportional to 12,121.23, 16,720.05 and 7,397.31 is: 10,203.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.23 : 16,720.05 = 7,397.31 : x
  2. Step 2: Convert to fraction form
    12,121.23/16,720.05 = 7,397.31/x
  3. Step 3: Cross multiply
    12,121.23x = 16,720.05 × 7,397.31
  4. Step 4: Simplify right side
    12,121.23x = 123,683,393.07
  5. Step 5: Solve for x
    x = 123,683,393.07/12,121.23
  6. Step 6: Final answer
    x = 10,203.86

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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.