Home / 20,386.32-28,133.52-11,433.36

Finding the Fourth Proportional to 20,386.32, 28,133.52 and 11,433.36

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Solution

The fourth proportional to 20,386.32, 28,133.52 and 11,433.36 is: 15,778.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.32 : 28,133.52 = 11,433.36 : x
  2. Step 2: Convert to fraction form
    20,386.32/28,133.52 = 11,433.36/x
  3. Step 3: Cross multiply
    20,386.32x = 28,133.52 × 11,433.36
  4. Step 4: Simplify right side
    20,386.32x = 321,660,662.23
  5. Step 5: Solve for x
    x = 321,660,662.23/20,386.32
  6. Step 6: Final answer
    x = 15,778.26

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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.