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Finding the Fourth Proportional to 15,916.54, 21,965.75 and 8,842.90

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Solution

The fourth proportional to 15,916.54, 21,965.75 and 8,842.90 is: 12,203.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.54 : 21,965.75 = 8,842.90 : x
  2. Step 2: Convert to fraction form
    15,916.54/21,965.75 = 8,842.90/x
  3. Step 3: Cross multiply
    15,916.54x = 21,965.75 × 8,842.90
  4. Step 4: Simplify right side
    15,916.54x = 194,240,776.63
  5. Step 5: Solve for x
    x = 194,240,776.63/15,916.54
  6. Step 6: Final answer
    x = 12,203.71

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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.