Home / 21,011.32-31,514.54-5,427.72

Finding the Fourth Proportional to 21,011.32, 31,514.54 and 5,427.72

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Solution

The fourth proportional to 21,011.32, 31,514.54 and 5,427.72 is: 8,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.32 : 31,514.54 = 5,427.72 : x
  2. Step 2: Convert to fraction form
    21,011.32/31,514.54 = 5,427.72/x
  3. Step 3: Cross multiply
    21,011.32x = 31,514.54 × 5,427.72
  4. Step 4: Simplify right side
    21,011.32x = 171,052,099.05
  5. Step 5: Solve for x
    x = 171,052,099.05/21,011.32
  6. Step 6: Final answer
    x = 8,140.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.