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Finding the Fourth Proportional to 6,409.59, 8,842.10 and 4,990.77

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Solution

The fourth proportional to 6,409.59, 8,842.10 and 4,990.77 is: 6,884.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.59 : 8,842.10 = 4,990.77 : x
  2. Step 2: Convert to fraction form
    6,409.59/8,842.10 = 4,990.77/x
  3. Step 3: Cross multiply
    6,409.59x = 8,842.10 × 4,990.77
  4. Step 4: Simplify right side
    6,409.59x = 44,128,862.46
  5. Step 5: Solve for x
    x = 44,128,862.46/6,409.59
  6. Step 6: Final answer
    x = 6,884.82

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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.