Home / 21,218.75-31,779.68-10,133.24

Finding the Fourth Proportional to 21,218.75, 31,779.68 and 10,133.24

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Solution

The fourth proportional to 21,218.75, 31,779.68 and 10,133.24 is: 15,176.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.75 : 31,779.68 = 10,133.24 : x
  2. Step 2: Convert to fraction form
    21,218.75/31,779.68 = 10,133.24/x
  3. Step 3: Cross multiply
    21,218.75x = 31,779.68 × 10,133.24
  4. Step 4: Simplify right side
    21,218.75x = 322,031,153.35
  5. Step 5: Solve for x
    x = 322,031,153.35/21,218.75
  6. Step 6: Final answer
    x = 15,176.73

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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.