Home / 15,272.78-21,076.08-8,985.56

Finding the Fourth Proportional to 15,272.78, 21,076.08 and 8,985.56

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Solution

The fourth proportional to 15,272.78, 21,076.08 and 8,985.56 is: 12,399.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,272.78 : 21,076.08 = 8,985.56 : x
  2. Step 2: Convert to fraction form
    15,272.78/21,076.08 = 8,985.56/x
  3. Step 3: Cross multiply
    15,272.78x = 21,076.08 × 8,985.56
  4. Step 4: Simplify right side
    15,272.78x = 189,380,381.40
  5. Step 5: Solve for x
    x = 189,380,381.40/15,272.78
  6. Step 6: Final answer
    x = 12,399.86

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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.