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Finding the Fourth Proportional to 13,959.54, 20,931.21 and 6,559.38

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Solution

The fourth proportional to 13,959.54, 20,931.21 and 6,559.38 is: 9,835.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.54 : 20,931.21 = 6,559.38 : x
  2. Step 2: Convert to fraction form
    13,959.54/20,931.21 = 6,559.38/x
  3. Step 3: Cross multiply
    13,959.54x = 20,931.21 × 6,559.38
  4. Step 4: Simplify right side
    13,959.54x = 137,295,760.25
  5. Step 5: Solve for x
    x = 137,295,760.25/13,959.54
  6. Step 6: Final answer
    x = 9,835.26

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1.5x scale

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.