Home / 15,825.89-21,839.69-9,109.07

Finding the Fourth Proportional to 15,825.89, 21,839.69 and 9,109.07

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Solution

The fourth proportional to 15,825.89, 21,839.69 and 9,109.07 is: 12,570.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,825.89 : 21,839.69 = 9,109.07 : x
  2. Step 2: Convert to fraction form
    15,825.89/21,839.69 = 9,109.07/x
  3. Step 3: Cross multiply
    15,825.89x = 21,839.69 × 9,109.07
  4. Step 4: Simplify right side
    15,825.89x = 198,939,110.24
  5. Step 5: Solve for x
    x = 198,939,110.24/15,825.89
  6. Step 6: Final answer
    x = 12,570.49

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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.