Home / 15,134.84-20,886.32-8,420.55

Finding the Fourth Proportional to 15,134.84, 20,886.32 and 8,420.55

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Solution

The fourth proportional to 15,134.84, 20,886.32 and 8,420.55 is: 11,620.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.84 : 20,886.32 = 8,420.55 : x
  2. Step 2: Convert to fraction form
    15,134.84/20,886.32 = 8,420.55/x
  3. Step 3: Cross multiply
    15,134.84x = 20,886.32 × 8,420.55
  4. Step 4: Simplify right side
    15,134.84x = 175,874,197.44
  5. Step 5: Solve for x
    x = 175,874,197.44/15,134.84
  6. Step 6: Final answer
    x = 11,620.49

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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.