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Finding the Fourth Proportional to 15,798.45, 21,801.36 and 8,724.31

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Solution

The fourth proportional to 15,798.45, 21,801.36 and 8,724.31 is: 12,039.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,798.45 : 21,801.36 = 8,724.31 : x
  2. Step 2: Convert to fraction form
    15,798.45/21,801.36 = 8,724.31/x
  3. Step 3: Cross multiply
    15,798.45x = 21,801.36 × 8,724.31
  4. Step 4: Simplify right side
    15,798.45x = 190,201,823.06
  5. Step 5: Solve for x
    x = 190,201,823.06/15,798.45
  6. Step 6: Final answer
    x = 12,039.27

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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.