Home / 21,211.20-31,975.56-19,783.98

Finding the Fourth Proportional to 21,211.20, 31,975.56 and 19,783.98

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Solution

The fourth proportional to 21,211.20, 31,975.56 and 19,783.98 is: 29,824.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.20 : 31,975.56 = 19,783.98 : x
  2. Step 2: Convert to fraction form
    21,211.20/31,975.56 = 19,783.98/x
  3. Step 3: Cross multiply
    21,211.20x = 31,975.56 × 19,783.98
  4. Step 4: Simplify right side
    21,211.20x = 632,603,839.53
  5. Step 5: Solve for x
    x = 632,603,839.53/21,211.20
  6. Step 6: Final answer
    x = 29,824.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.