Home / 15,427.78-21,290.35-8,714.84

Finding the Fourth Proportional to 15,427.78, 21,290.35 and 8,714.84

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Solution

The fourth proportional to 15,427.78, 21,290.35 and 8,714.84 is: 12,026.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.78 : 21,290.35 = 8,714.84 : x
  2. Step 2: Convert to fraction form
    15,427.78/21,290.35 = 8,714.84/x
  3. Step 3: Cross multiply
    15,427.78x = 21,290.35 × 8,714.84
  4. Step 4: Simplify right side
    15,427.78x = 185,541,993.79
  5. Step 5: Solve for x
    x = 185,541,993.79/15,427.78
  6. Step 6: Final answer
    x = 12,026.49

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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.