Home / 28,921.80-43,374.60-9,206.40

Finding the Fourth Proportional to 28,921.80, 43,374.60 and 9,206.40

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Solution

The fourth proportional to 28,921.80, 43,374.60 and 9,206.40 is: 13,807.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.80 : 43,374.60 = 9,206.40 : x
  2. Step 2: Convert to fraction form
    28,921.80/43,374.60 = 9,206.40/x
  3. Step 3: Cross multiply
    28,921.80x = 43,374.60 × 9,206.40
  4. Step 4: Simplify right side
    28,921.80x = 399,323,917.44
  5. Step 5: Solve for x
    x = 399,323,917.44/28,921.80
  6. Step 6: Final answer
    x = 13,807.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.