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Finding the Fourth Proportional to 15,274.85, 21,080.12 and 8,562.64

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Solution

The fourth proportional to 15,274.85, 21,080.12 and 8,562.64 is: 11,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,274.85 : 21,080.12 = 8,562.64 : x
  2. Step 2: Convert to fraction form
    15,274.85/21,080.12 = 8,562.64/x
  3. Step 3: Cross multiply
    15,274.85x = 21,080.12 × 8,562.64
  4. Step 4: Simplify right side
    15,274.85x = 180,501,478.72
  5. Step 5: Solve for x
    x = 180,501,478.72/15,274.85
  6. Step 6: Final answer
    x = 11,816.91

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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.