Home / 20,962.72-28,928.64-11,531.68

Finding the Fourth Proportional to 20,962.72, 28,928.64 and 11,531.68

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Solution

The fourth proportional to 20,962.72, 28,928.64 and 11,531.68 is: 15,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.72 : 28,928.64 = 11,531.68 : x
  2. Step 2: Convert to fraction form
    20,962.72/28,928.64 = 11,531.68/x
  3. Step 3: Cross multiply
    20,962.72x = 28,928.64 × 11,531.68
  4. Step 4: Simplify right side
    20,962.72x = 333,595,819.32
  5. Step 5: Solve for x
    x = 333,595,819.32/20,962.72
  6. Step 6: Final answer
    x = 15,913.77

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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.