Home / 15,156.54-20,915.91-8,442.09

Finding the Fourth Proportional to 15,156.54, 20,915.91 and 8,442.09

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Solution

The fourth proportional to 15,156.54, 20,915.91 and 8,442.09 is: 11,650.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.54 : 20,915.91 = 8,442.09 : x
  2. Step 2: Convert to fraction form
    15,156.54/20,915.91 = 8,442.09/x
  3. Step 3: Cross multiply
    15,156.54x = 20,915.91 × 8,442.09
  4. Step 4: Simplify right side
    15,156.54x = 176,573,994.65
  5. Step 5: Solve for x
    x = 176,573,994.65/15,156.54
  6. Step 6: Final answer
    x = 11,650.02

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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.