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Finding the Fourth Proportional to 8,811.50, 12,158.75 and 4,831.57

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Solution

The fourth proportional to 8,811.50, 12,158.75 and 4,831.57 is: 6,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.50 : 12,158.75 = 4,831.57 : x
  2. Step 2: Convert to fraction form
    8,811.50/12,158.75 = 4,831.57/x
  3. Step 3: Cross multiply
    8,811.50x = 12,158.75 × 4,831.57
  4. Step 4: Simplify right side
    8,811.50x = 58,745,851.74
  5. Step 5: Solve for x
    x = 58,745,851.74/8,811.50
  6. Step 6: Final answer
    x = 6,666.95

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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.