Home / 20,947.60-28,907.79-11,516.77

Finding the Fourth Proportional to 20,947.60, 28,907.79 and 11,516.77

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Solution

The fourth proportional to 20,947.60, 28,907.79 and 11,516.77 is: 15,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.60 : 28,907.79 = 11,516.77 : x
  2. Step 2: Convert to fraction form
    20,947.60/28,907.79 = 11,516.77/x
  3. Step 3: Cross multiply
    20,947.60x = 28,907.79 × 11,516.77
  4. Step 4: Simplify right side
    20,947.60x = 332,924,368.64
  5. Step 5: Solve for x
    x = 332,924,368.64/20,947.60
  6. Step 6: Final answer
    x = 15,893.20

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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.