Home / 20,357.28-28,095.11-11,406.38

Finding the Fourth Proportional to 20,357.28, 28,095.11 and 11,406.38

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Solution

The fourth proportional to 20,357.28, 28,095.11 and 11,406.38 is: 15,741.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.28 : 28,095.11 = 11,406.38 : x
  2. Step 2: Convert to fraction form
    20,357.28/28,095.11 = 11,406.38/x
  3. Step 3: Cross multiply
    20,357.28x = 28,095.11 × 11,406.38
  4. Step 4: Simplify right side
    20,357.28x = 320,463,303.29
  5. Step 5: Solve for x
    x = 320,463,303.29/20,357.28
  6. Step 6: Final answer
    x = 15,741.95

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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.