Home / 20,962.56-28,928.40-11,531.72

Finding the Fourth Proportional to 20,962.56, 28,928.40 and 11,531.72

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Solution

The fourth proportional to 20,962.56, 28,928.40 and 11,531.72 is: 15,913.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.56 : 28,928.40 = 11,531.72 : x
  2. Step 2: Convert to fraction form
    20,962.56/28,928.40 = 11,531.72/x
  3. Step 3: Cross multiply
    20,962.56x = 28,928.40 × 11,531.72
  4. Step 4: Simplify right side
    20,962.56x = 333,594,208.85
  5. Step 5: Solve for x
    x = 333,594,208.85/20,962.56
  6. Step 6: Final answer
    x = 15,913.81

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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.