Home / 20,738.91-28,619.65-11,307.47

Finding the Fourth Proportional to 20,738.91, 28,619.65 and 11,307.47

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Solution

The fourth proportional to 20,738.91, 28,619.65 and 11,307.47 is: 15,604.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.91 : 28,619.65 = 11,307.47 : x
  2. Step 2: Convert to fraction form
    20,738.91/28,619.65 = 11,307.47/x
  3. Step 3: Cross multiply
    20,738.91x = 28,619.65 × 11,307.47
  4. Step 4: Simplify right side
    20,738.91x = 323,615,877.07
  5. Step 5: Solve for x
    x = 323,615,877.07/20,738.91
  6. Step 6: Final answer
    x = 15,604.29

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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.