Home / 28,191-38,904.80-15,615.75

Finding the Fourth Proportional to 28,191, 38,904.80 and 15,615.75

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Solution

The fourth proportional to 28,191, 38,904.80 and 15,615.75 is: 21,550.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191 : 38,904.80 = 15,615.75 : x
  2. Step 2: Convert to fraction form
    28,191/38,904.80 = 15,615.75/x
  3. Step 3: Cross multiply
    28,191x = 38,904.80 × 15,615.75
  4. Step 4: Simplify right side
    28,191x = 607,527,552.52
  5. Step 5: Solve for x
    x = 607,527,552.52/28,191
  6. Step 6: Final answer
    x = 21,550.41

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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.