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Finding the Fourth Proportional to 8,809.86, 12,157.70 and 4,831.06

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Solution

The fourth proportional to 8,809.86, 12,157.70 and 4,831.06 is: 6,666.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.86 : 12,157.70 = 4,831.06 : x
  2. Step 2: Convert to fraction form
    8,809.86/12,157.70 = 4,831.06/x
  3. Step 3: Cross multiply
    8,809.86x = 12,157.70 × 4,831.06
  4. Step 4: Simplify right side
    8,809.86x = 58,734,578.16
  5. Step 5: Solve for x
    x = 58,734,578.16/8,809.86
  6. Step 6: Final answer
    x = 6,666.91

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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.