Home / 13,531.86-20,289.56-7,986.47

Finding the Fourth Proportional to 13,531.86, 20,289.56 and 7,986.47

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Solution

The fourth proportional to 13,531.86, 20,289.56 and 7,986.47 is: 11,974.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,531.86 : 20,289.56 = 7,986.47 : x
  2. Step 2: Convert to fraction form
    13,531.86/20,289.56 = 7,986.47/x
  3. Step 3: Cross multiply
    13,531.86x = 20,289.56 × 7,986.47
  4. Step 4: Simplify right side
    13,531.86x = 162,041,820.87
  5. Step 5: Solve for x
    x = 162,041,820.87/13,531.86
  6. Step 6: Final answer
    x = 11,974.84

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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.