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Finding the Fourth Proportional to 15,768.61, 21,760.76 and 8,695.03

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Solution

The fourth proportional to 15,768.61, 21,760.76 and 8,695.03 is: 11,999.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.61 : 21,760.76 = 8,695.03 : x
  2. Step 2: Convert to fraction form
    15,768.61/21,760.76 = 8,695.03/x
  3. Step 3: Cross multiply
    15,768.61x = 21,760.76 × 8,695.03
  4. Step 4: Simplify right side
    15,768.61x = 189,210,573.19
  5. Step 5: Solve for x
    x = 189,210,573.19/15,768.61
  6. Step 6: Final answer
    x = 11,999.19

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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.