Home / 12,721.33-19,057.29-7,157.71

Finding the Fourth Proportional to 12,721.33, 19,057.29 and 7,157.71

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Solution

The fourth proportional to 12,721.33, 19,057.29 and 7,157.71 is: 10,722.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.33 : 19,057.29 = 7,157.71 : x
  2. Step 2: Convert to fraction form
    12,721.33/19,057.29 = 7,157.71/x
  3. Step 3: Cross multiply
    12,721.33x = 19,057.29 × 7,157.71
  4. Step 4: Simplify right side
    12,721.33x = 136,406,555.21
  5. Step 5: Solve for x
    x = 136,406,555.21/12,721.33
  6. Step 6: Final answer
    x = 10,722.66

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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.