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Finding the Fourth Proportional to 15,769.72, 21,762.24 and 8,696.12

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Solution

The fourth proportional to 15,769.72, 21,762.24 and 8,696.12 is: 12,000.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.72 : 21,762.24 = 8,696.12 : x
  2. Step 2: Convert to fraction form
    15,769.72/21,762.24 = 8,696.12/x
  3. Step 3: Cross multiply
    15,769.72x = 21,762.24 × 8,696.12
  4. Step 4: Simplify right side
    15,769.72x = 189,247,050.51
  5. Step 5: Solve for x
    x = 189,247,050.51/15,769.72
  6. Step 6: Final answer
    x = 12,000.66

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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.