Home / 12,148.09-16,772.11-9,915.29

Finding the Fourth Proportional to 12,148.09, 16,772.11 and 9,915.29

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Solution

The fourth proportional to 12,148.09, 16,772.11 and 9,915.29 is: 13,689.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.09 : 16,772.11 = 9,915.29 : x
  2. Step 2: Convert to fraction form
    12,148.09/16,772.11 = 9,915.29/x
  3. Step 3: Cross multiply
    12,148.09x = 16,772.11 × 9,915.29
  4. Step 4: Simplify right side
    12,148.09x = 166,300,334.56
  5. Step 5: Solve for x
    x = 166,300,334.56/12,148.09
  6. Step 6: Final answer
    x = 13,689.42

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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.