Home / 21,185.18-31,777.74-19,783.94

Finding the Fourth Proportional to 21,185.18, 31,777.74 and 19,783.94

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Solution

The fourth proportional to 21,185.18, 31,777.74 and 19,783.94 is: 29,675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.18 : 31,777.74 = 19,783.94 : x
  2. Step 2: Convert to fraction form
    21,185.18/31,777.74 = 19,783.94/x
  3. Step 3: Cross multiply
    21,185.18x = 31,777.74 × 19,783.94
  4. Step 4: Simplify right side
    21,185.18x = 628,688,742.61
  5. Step 5: Solve for x
    x = 628,688,742.61/21,185.18
  6. Step 6: Final answer
    x = 29,675.88

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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.