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Finding the Fourth Proportional to 8,990.37, 12,406.91 and 5,011.88

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Solution

The fourth proportional to 8,990.37, 12,406.91 and 5,011.88 is: 6,916.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.37 : 12,406.91 = 5,011.88 : x
  2. Step 2: Convert to fraction form
    8,990.37/12,406.91 = 5,011.88/x
  3. Step 3: Cross multiply
    8,990.37x = 12,406.91 × 5,011.88
  4. Step 4: Simplify right side
    8,990.37x = 62,181,857.00
  5. Step 5: Solve for x
    x = 62,181,857.00/8,990.37
  6. Step 6: Final answer
    x = 6,916.50

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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.