Home / 28,238.51-38,969.15-15,663.26

Finding the Fourth Proportional to 28,238.51, 38,969.15 and 15,663.26

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Solution

The fourth proportional to 28,238.51, 38,969.15 and 15,663.26 is: 21,615.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.51 : 38,969.15 = 15,663.26 : x
  2. Step 2: Convert to fraction form
    28,238.51/38,969.15 = 15,663.26/x
  3. Step 3: Cross multiply
    28,238.51x = 38,969.15 × 15,663.26
  4. Step 4: Simplify right side
    28,238.51x = 610,383,655.27
  5. Step 5: Solve for x
    x = 610,383,655.27/28,238.51
  6. Step 6: Final answer
    x = 21,615.30

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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.