Home / 21,213.18-31,811.56-7,169.45

Finding the Fourth Proportional to 21,213.18, 31,811.56 and 7,169.45

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Solution

The fourth proportional to 21,213.18, 31,811.56 and 7,169.45 is: 10,751.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.18 : 31,811.56 = 7,169.45 : x
  2. Step 2: Convert to fraction form
    21,213.18/31,811.56 = 7,169.45/x
  3. Step 3: Cross multiply
    21,213.18x = 31,811.56 × 7,169.45
  4. Step 4: Simplify right side
    21,213.18x = 228,071,211.86
  5. Step 5: Solve for x
    x = 228,071,211.86/21,213.18
  6. Step 6: Final answer
    x = 10,751.39

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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.