Home / 21,780.97-30,055.93-12,219.53

Finding the Fourth Proportional to 21,780.97, 30,055.93 and 12,219.53

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Solution

The fourth proportional to 21,780.97, 30,055.93 and 12,219.53 is: 16,861.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.97 : 30,055.93 = 12,219.53 : x
  2. Step 2: Convert to fraction form
    21,780.97/30,055.93 = 12,219.53/x
  3. Step 3: Cross multiply
    21,780.97x = 30,055.93 × 12,219.53
  4. Step 4: Simplify right side
    21,780.97x = 367,269,157.48
  5. Step 5: Solve for x
    x = 367,269,157.48/21,780.97
  6. Step 6: Final answer
    x = 16,861.93

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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.