Home / 20,933.19-31,399.80-13,147.47

Finding the Fourth Proportional to 20,933.19, 31,399.80 and 13,147.47

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Solution

The fourth proportional to 20,933.19, 31,399.80 and 13,147.47 is: 19,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.19 : 31,399.80 = 13,147.47 : x
  2. Step 2: Convert to fraction form
    20,933.19/31,399.80 = 13,147.47/x
  3. Step 3: Cross multiply
    20,933.19x = 31,399.80 × 13,147.47
  4. Step 4: Simplify right side
    20,933.19x = 412,827,928.51
  5. Step 5: Solve for x
    x = 412,827,928.51/20,933.19
  6. Step 6: Final answer
    x = 19,721.21

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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.