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Finding the Fourth Proportional to 15,790.01, 21,789.41 and 8,715.06

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Solution

The fourth proportional to 15,790.01, 21,789.41 and 8,715.06 is: 12,026.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.01 : 21,789.41 = 8,715.06 : x
  2. Step 2: Convert to fraction form
    15,790.01/21,789.41 = 8,715.06/x
  3. Step 3: Cross multiply
    15,790.01x = 21,789.41 × 8,715.06
  4. Step 4: Simplify right side
    15,790.01x = 189,895,971.94
  5. Step 5: Solve for x
    x = 189,895,971.94/15,790.01
  6. Step 6: Final answer
    x = 12,026.34

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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.