Home / 21,180.08-31,774.26-6,390.20

Finding the Fourth Proportional to 21,180.08, 31,774.26 and 6,390.20

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Solution

The fourth proportional to 21,180.08, 31,774.26 and 6,390.20 is: 9,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.08 : 31,774.26 = 6,390.20 : x
  2. Step 2: Convert to fraction form
    21,180.08/31,774.26 = 6,390.20/x
  3. Step 3: Cross multiply
    21,180.08x = 31,774.26 × 6,390.20
  4. Step 4: Simplify right side
    21,180.08x = 203,043,876.25
  5. Step 5: Solve for x
    x = 203,043,876.25/21,180.08
  6. Step 6: Final answer
    x = 9,586.55

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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.