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Finding the Fourth Proportional to 15,095.40, 20,831.36 and 8,380.68

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Solution

The fourth proportional to 15,095.40, 20,831.36 and 8,380.68 is: 11,565.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,095.40 : 20,831.36 = 8,380.68 : x
  2. Step 2: Convert to fraction form
    15,095.40/20,831.36 = 8,380.68/x
  3. Step 3: Cross multiply
    15,095.40x = 20,831.36 × 8,380.68
  4. Step 4: Simplify right side
    15,095.40x = 174,580,962.12
  5. Step 5: Solve for x
    x = 174,580,962.12/15,095.40
  6. Step 6: Final answer
    x = 11,565.18

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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.