Home / 20,703.22-28,570.62-11,271.76

Finding the Fourth Proportional to 20,703.22, 28,570.62 and 11,271.76

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Solution

The fourth proportional to 20,703.22, 28,570.62 and 11,271.76 is: 15,555.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.22 : 28,570.62 = 11,271.76 : x
  2. Step 2: Convert to fraction form
    20,703.22/28,570.62 = 11,271.76/x
  3. Step 3: Cross multiply
    20,703.22x = 28,570.62 × 11,271.76
  4. Step 4: Simplify right side
    20,703.22x = 322,041,171.69
  5. Step 5: Solve for x
    x = 322,041,171.69/20,703.22
  6. Step 6: Final answer
    x = 15,555.12

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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.