Home / 21,188.85-31,783.47-6,397.89

Finding the Fourth Proportional to 21,188.85, 31,783.47 and 6,397.89

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Solution

The fourth proportional to 21,188.85, 31,783.47 and 6,397.89 is: 9,596.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.85 : 31,783.47 = 6,397.89 : x
  2. Step 2: Convert to fraction form
    21,188.85/31,783.47 = 6,397.89/x
  3. Step 3: Cross multiply
    21,188.85x = 31,783.47 × 6,397.89
  4. Step 4: Simplify right side
    21,188.85x = 203,347,144.88
  5. Step 5: Solve for x
    x = 203,347,144.88/21,188.85
  6. Step 6: Final answer
    x = 9,596.89

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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.