Home / 21,186.18-31,779.24-19,784.94

Finding the Fourth Proportional to 21,186.18, 31,779.24 and 19,784.94

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Solution

The fourth proportional to 21,186.18, 31,779.24 and 19,784.94 is: 29,677.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.18 : 31,779.24 = 19,784.94 : x
  2. Step 2: Convert to fraction form
    21,186.18/31,779.24 = 19,784.94/x
  3. Step 3: Cross multiply
    21,186.18x = 31,779.24 × 19,784.94
  4. Step 4: Simplify right side
    21,186.18x = 628,750,356.65
  5. Step 5: Solve for x
    x = 628,750,356.65/21,186.18
  6. Step 6: Final answer
    x = 29,677.38

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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.