Home / 20,827.80-31,244.40-10,303.20

Finding the Fourth Proportional to 20,827.80, 31,244.40 and 10,303.20

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Solution

The fourth proportional to 20,827.80, 31,244.40 and 10,303.20 is: 15,456.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.80 : 31,244.40 = 10,303.20 : x
  2. Step 2: Convert to fraction form
    20,827.80/31,244.40 = 10,303.20/x
  3. Step 3: Cross multiply
    20,827.80x = 31,244.40 × 10,303.20
  4. Step 4: Simplify right side
    20,827.80x = 321,917,302.08
  5. Step 5: Solve for x
    x = 321,917,302.08/20,827.80
  6. Step 6: Final answer
    x = 15,456.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.