Home / 20,817.48-31,208.04-9,126.84

Finding the Fourth Proportional to 20,817.48, 31,208.04 and 9,126.84

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Solution

The fourth proportional to 20,817.48, 31,208.04 and 9,126.84 is: 13,682.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.48 : 31,208.04 = 9,126.84 : x
  2. Step 2: Convert to fraction form
    20,817.48/31,208.04 = 9,126.84/x
  3. Step 3: Cross multiply
    20,817.48x = 31,208.04 × 9,126.84
  4. Step 4: Simplify right side
    20,817.48x = 284,830,787.79
  5. Step 5: Solve for x
    x = 284,830,787.79/20,817.48
  6. Step 6: Final answer
    x = 13,682.29

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1.5x scale

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.