Home / 20,330.88-28,055.04-11,378.24

Finding the Fourth Proportional to 20,330.88, 28,055.04 and 11,378.24

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Solution

The fourth proportional to 20,330.88, 28,055.04 and 11,378.24 is: 15,701.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.88 : 28,055.04 = 11,378.24 : x
  2. Step 2: Convert to fraction form
    20,330.88/28,055.04 = 11,378.24/x
  3. Step 3: Cross multiply
    20,330.88x = 28,055.04 × 11,378.24
  4. Step 4: Simplify right side
    20,330.88x = 319,216,978.33
  5. Step 5: Solve for x
    x = 319,216,978.33/20,330.88
  6. Step 6: Final answer
    x = 15,701.09

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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.