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Finding the Fourth Proportional to 15,562.62, 21,478.21 and 8,664.48

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Solution

The fourth proportional to 15,562.62, 21,478.21 and 8,664.48 is: 11,957.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,562.62 : 21,478.21 = 8,664.48 : x
  2. Step 2: Convert to fraction form
    15,562.62/21,478.21 = 8,664.48/x
  3. Step 3: Cross multiply
    15,562.62x = 21,478.21 × 8,664.48
  4. Step 4: Simplify right side
    15,562.62x = 186,097,499.32
  5. Step 5: Solve for x
    x = 186,097,499.32/15,562.62
  6. Step 6: Final answer
    x = 11,957.98

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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.