Home / 21,048.25-31,555.61-12,153.49

Finding the Fourth Proportional to 21,048.25, 31,555.61 and 12,153.49

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Solution

The fourth proportional to 21,048.25, 31,555.61 and 12,153.49 is: 18,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.25 : 31,555.61 = 12,153.49 : x
  2. Step 2: Convert to fraction form
    21,048.25/31,555.61 = 12,153.49/x
  3. Step 3: Cross multiply
    21,048.25x = 31,555.61 × 12,153.49
  4. Step 4: Simplify right side
    21,048.25x = 383,510,769.26
  5. Step 5: Solve for x
    x = 383,510,769.26/21,048.25
  6. Step 6: Final answer
    x = 18,220.56

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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.