Home / 21,281.49-31,905.30-13,792.71

Finding the Fourth Proportional to 21,281.49, 31,905.30 and 13,792.71

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Solution

The fourth proportional to 21,281.49, 31,905.30 and 13,792.71 is: 20,678.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.49 : 31,905.30 = 13,792.71 : x
  2. Step 2: Convert to fraction form
    21,281.49/31,905.30 = 13,792.71/x
  3. Step 3: Cross multiply
    21,281.49x = 31,905.30 × 13,792.71
  4. Step 4: Simplify right side
    21,281.49x = 440,060,550.36
  5. Step 5: Solve for x
    x = 440,060,550.36/21,281.49
  6. Step 6: Final answer
    x = 20,678.09

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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.