Home / 21,188.88-31,780.08-5,607.72

Finding the Fourth Proportional to 21,188.88, 31,780.08 and 5,607.72

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Solution

The fourth proportional to 21,188.88, 31,780.08 and 5,607.72 is: 8,410.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.88 : 31,780.08 = 5,607.72 : x
  2. Step 2: Convert to fraction form
    21,188.88/31,780.08 = 5,607.72/x
  3. Step 3: Cross multiply
    21,188.88x = 31,780.08 × 5,607.72
  4. Step 4: Simplify right side
    21,188.88x = 178,213,790.22
  5. Step 5: Solve for x
    x = 178,213,790.22/21,188.88
  6. Step 6: Final answer
    x = 8,410.72

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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.