Home / 20,606.54-28,449.80-15,817.31

Finding the Fourth Proportional to 20,606.54, 28,449.80 and 15,817.31

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Solution

The fourth proportional to 20,606.54, 28,449.80 and 15,817.31 is: 21,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.54 : 28,449.80 = 15,817.31 : x
  2. Step 2: Convert to fraction form
    20,606.54/28,449.80 = 15,817.31/x
  3. Step 3: Cross multiply
    20,606.54x = 28,449.80 × 15,817.31
  4. Step 4: Simplify right side
    20,606.54x = 449,999,298.08
  5. Step 5: Solve for x
    x = 449,999,298.08/20,606.54
  6. Step 6: Final answer
    x = 21,837.70

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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.