Home / 20,855.68-28,779.36-11,424.16

Finding the Fourth Proportional to 20,855.68, 28,779.36 and 11,424.16

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Solution

The fourth proportional to 20,855.68, 28,779.36 and 11,424.16 is: 15,764.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.68 : 28,779.36 = 11,424.16 : x
  2. Step 2: Convert to fraction form
    20,855.68/28,779.36 = 11,424.16/x
  3. Step 3: Cross multiply
    20,855.68x = 28,779.36 × 11,424.16
  4. Step 4: Simplify right side
    20,855.68x = 328,780,013.34
  5. Step 5: Solve for x
    x = 328,780,013.34/20,855.68
  6. Step 6: Final answer
    x = 15,764.53

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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.