Home / 15,390.97-21,238.01-9,424.33

Finding the Fourth Proportional to 15,390.97, 21,238.01 and 9,424.33

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Solution

The fourth proportional to 15,390.97, 21,238.01 and 9,424.33 is: 13,004.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.97 : 21,238.01 = 9,424.33 : x
  2. Step 2: Convert to fraction form
    15,390.97/21,238.01 = 9,424.33/x
  3. Step 3: Cross multiply
    15,390.97x = 21,238.01 × 9,424.33
  4. Step 4: Simplify right side
    15,390.97x = 200,153,967.66
  5. Step 5: Solve for x
    x = 200,153,967.66/15,390.97
  6. Step 6: Final answer
    x = 13,004.64

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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.