Home / 15,851.49-21,872.34-9,137.40

Finding the Fourth Proportional to 15,851.49, 21,872.34 and 9,137.40

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Solution

The fourth proportional to 15,851.49, 21,872.34 and 9,137.40 is: 12,608.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.49 : 21,872.34 = 9,137.40 : x
  2. Step 2: Convert to fraction form
    15,851.49/21,872.34 = 9,137.40/x
  3. Step 3: Cross multiply
    15,851.49x = 21,872.34 × 9,137.40
  4. Step 4: Simplify right side
    15,851.49x = 199,856,319.52
  5. Step 5: Solve for x
    x = 199,856,319.52/15,851.49
  6. Step 6: Final answer
    x = 12,608.05

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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.