Home / 20,822.40-31,248.72-8,173.98

Finding the Fourth Proportional to 20,822.40, 31,248.72 and 8,173.98

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Solution

The fourth proportional to 20,822.40, 31,248.72 and 8,173.98 is: 12,266.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.40 : 31,248.72 = 8,173.98 : x
  2. Step 2: Convert to fraction form
    20,822.40/31,248.72 = 8,173.98/x
  3. Step 3: Cross multiply
    20,822.40x = 31,248.72 × 8,173.98
  4. Step 4: Simplify right side
    20,822.40x = 255,426,412.31
  5. Step 5: Solve for x
    x = 255,426,412.31/20,822.40
  6. Step 6: Final answer
    x = 12,266.91

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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.