Home / 21,780.53-30,056.73-12,220.59

Finding the Fourth Proportional to 21,780.53, 30,056.73 and 12,220.59

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Solution

The fourth proportional to 21,780.53, 30,056.73 and 12,220.59 is: 16,864.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.53 : 30,056.73 = 12,220.59 : x
  2. Step 2: Convert to fraction form
    21,780.53/30,056.73 = 12,220.59/x
  3. Step 3: Cross multiply
    21,780.53x = 30,056.73 × 12,220.59
  4. Step 4: Simplify right side
    21,780.53x = 367,310,974.07
  5. Step 5: Solve for x
    x = 367,310,974.07/21,780.53
  6. Step 6: Final answer
    x = 16,864.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.