Home / 20,969.37-28,969.52-15,654.96

Finding the Fourth Proportional to 20,969.37, 28,969.52 and 15,654.96

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Solution

The fourth proportional to 20,969.37, 28,969.52 and 15,654.96 is: 21,627.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.37 : 28,969.52 = 15,654.96 : x
  2. Step 2: Convert to fraction form
    20,969.37/28,969.52 = 15,654.96/x
  3. Step 3: Cross multiply
    20,969.37x = 28,969.52 × 15,654.96
  4. Step 4: Simplify right side
    20,969.37x = 453,516,598.54
  5. Step 5: Solve for x
    x = 453,516,598.54/20,969.37
  6. Step 6: Final answer
    x = 21,627.57

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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.