Home / 15,843.60-21,905.91-13,875.30

Finding the Fourth Proportional to 15,843.60, 21,905.91 and 13,875.30

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Solution

The fourth proportional to 15,843.60, 21,905.91 and 13,875.30 is: 19,184.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.60 : 21,905.91 = 13,875.30 : x
  2. Step 2: Convert to fraction form
    15,843.60/21,905.91 = 13,875.30/x
  3. Step 3: Cross multiply
    15,843.60x = 21,905.91 × 13,875.30
  4. Step 4: Simplify right side
    15,843.60x = 303,951,073.02
  5. Step 5: Solve for x
    x = 303,951,073.02/15,843.60
  6. Step 6: Final answer
    x = 19,184.47

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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.