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Finding the Fourth Proportional to 15,843.71, 21,869.83 and 9,798.58

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Solution

The fourth proportional to 15,843.71, 21,869.83 and 9,798.58 is: 13,525.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.71 : 21,869.83 = 9,798.58 : x
  2. Step 2: Convert to fraction form
    15,843.71/21,869.83 = 9,798.58/x
  3. Step 3: Cross multiply
    15,843.71x = 21,869.83 × 9,798.58
  4. Step 4: Simplify right side
    15,843.71x = 214,293,269.43
  5. Step 5: Solve for x
    x = 214,293,269.43/15,843.71
  6. Step 6: Final answer
    x = 13,525.45

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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.