Home / 15,218.09-21,000.57-8,503.76

Finding the Fourth Proportional to 15,218.09, 21,000.57 and 8,503.76

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Solution

The fourth proportional to 15,218.09, 21,000.57 and 8,503.76 is: 11,734.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.09 : 21,000.57 = 8,503.76 : x
  2. Step 2: Convert to fraction form
    15,218.09/21,000.57 = 8,503.76/x
  3. Step 3: Cross multiply
    15,218.09x = 21,000.57 × 8,503.76
  4. Step 4: Simplify right side
    15,218.09x = 178,583,764.62
  5. Step 5: Solve for x
    x = 178,583,764.62/15,218.09
  6. Step 6: Final answer
    x = 11,734.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.