Home / 15,398.89-21,255.93-9,111.25

Finding the Fourth Proportional to 15,398.89, 21,255.93 and 9,111.25

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Solution

The fourth proportional to 15,398.89, 21,255.93 and 9,111.25 is: 12,576.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.89 : 21,255.93 = 9,111.25 : x
  2. Step 2: Convert to fraction form
    15,398.89/21,255.93 = 9,111.25/x
  3. Step 3: Cross multiply
    15,398.89x = 21,255.93 × 9,111.25
  4. Step 4: Simplify right side
    15,398.89x = 193,668,092.21
  5. Step 5: Solve for x
    x = 193,668,092.21/15,398.89
  6. Step 6: Final answer
    x = 12,576.76

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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.