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Finding the Fourth Proportional to 15,769.89, 21,762.68 and 8,696.31

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Solution

The fourth proportional to 15,769.89, 21,762.68 and 8,696.31 is: 12,001.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.89 : 21,762.68 = 8,696.31 : x
  2. Step 2: Convert to fraction form
    15,769.89/21,762.68 = 8,696.31/x
  3. Step 3: Cross multiply
    15,769.89x = 21,762.68 × 8,696.31
  4. Step 4: Simplify right side
    15,769.89x = 189,255,011.71
  5. Step 5: Solve for x
    x = 189,255,011.71/15,769.89
  6. Step 6: Final answer
    x = 12,001.04

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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.