Home / 20,368.88-28,109.52-11,416.64

Finding the Fourth Proportional to 20,368.88, 28,109.52 and 11,416.64

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Solution

The fourth proportional to 20,368.88, 28,109.52 and 11,416.64 is: 15,755.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.88 : 28,109.52 = 11,416.64 : x
  2. Step 2: Convert to fraction form
    20,368.88/28,109.52 = 11,416.64/x
  3. Step 3: Cross multiply
    20,368.88x = 28,109.52 × 11,416.64
  4. Step 4: Simplify right side
    20,368.88x = 320,916,270.41
  5. Step 5: Solve for x
    x = 320,916,270.41/20,368.88
  6. Step 6: Final answer
    x = 15,755.22

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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.