Home / 12,491.39-18,731.60-6,646.61

Finding the Fourth Proportional to 12,491.39, 18,731.60 and 6,646.61

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Solution

The fourth proportional to 12,491.39, 18,731.60 and 6,646.61 is: 9,966.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.39 : 18,731.60 = 6,646.61 : x
  2. Step 2: Convert to fraction form
    12,491.39/18,731.60 = 6,646.61/x
  3. Step 3: Cross multiply
    12,491.39x = 18,731.60 × 6,646.61
  4. Step 4: Simplify right side
    12,491.39x = 124,501,606.64
  5. Step 5: Solve for x
    x = 124,501,606.64/12,491.39
  6. Step 6: Final answer
    x = 9,966.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.