Home / 15,789.50-21,790.68-9,076.76

Finding the Fourth Proportional to 15,789.50, 21,790.68 and 9,076.76

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Solution

The fourth proportional to 15,789.50, 21,790.68 and 9,076.76 is: 12,526.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.50 : 21,790.68 = 9,076.76 : x
  2. Step 2: Convert to fraction form
    15,789.50/21,790.68 = 9,076.76/x
  3. Step 3: Cross multiply
    15,789.50x = 21,790.68 × 9,076.76
  4. Step 4: Simplify right side
    15,789.50x = 197,788,772.60
  5. Step 5: Solve for x
    x = 197,788,772.60/15,789.50
  6. Step 6: Final answer
    x = 12,526.60

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Half scale
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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.