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Finding the Fourth Proportional to 15,255.66, 21,052.81 and 8,541.30

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Solution

The fourth proportional to 15,255.66, 21,052.81 and 8,541.30 is: 11,786.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,255.66 : 21,052.81 = 8,541.30 : x
  2. Step 2: Convert to fraction form
    15,255.66/21,052.81 = 8,541.30/x
  3. Step 3: Cross multiply
    15,255.66x = 21,052.81 × 8,541.30
  4. Step 4: Simplify right side
    15,255.66x = 179,818,366.05
  5. Step 5: Solve for x
    x = 179,818,366.05/15,255.66
  6. Step 6: Final answer
    x = 11,786.99

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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.