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Finding the Fourth Proportional to 8,969.06, 12,375.85 and 4,990.07

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Solution

The fourth proportional to 8,969.06, 12,375.85 and 4,990.07 is: 6,885.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.06 : 12,375.85 = 4,990.07 : x
  2. Step 2: Convert to fraction form
    8,969.06/12,375.85 = 4,990.07/x
  3. Step 3: Cross multiply
    8,969.06x = 12,375.85 × 4,990.07
  4. Step 4: Simplify right side
    8,969.06x = 61,756,332.86
  5. Step 5: Solve for x
    x = 61,756,332.86/8,969.06
  6. Step 6: Final answer
    x = 6,885.49

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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.