Home / 9,121.20-13,702.45-7,875.62

Finding the Fourth Proportional to 9,121.20, 13,702.45 and 7,875.62

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Solution

The fourth proportional to 9,121.20, 13,702.45 and 7,875.62 is: 11,831.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.20 : 13,702.45 = 7,875.62 : x
  2. Step 2: Convert to fraction form
    9,121.20/13,702.45 = 7,875.62/x
  3. Step 3: Cross multiply
    9,121.20x = 13,702.45 × 7,875.62
  4. Step 4: Simplify right side
    9,121.20x = 107,915,289.27
  5. Step 5: Solve for x
    x = 107,915,289.27/9,121.20
  6. Step 6: Final answer
    x = 11,831.26

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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.