Home / 12,491.31-18,730.47-4,591.80

Finding the Fourth Proportional to 12,491.31, 18,730.47 and 4,591.80

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Solution

The fourth proportional to 12,491.31, 18,730.47 and 4,591.80 is: 6,885.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.31 : 18,730.47 = 4,591.80 : x
  2. Step 2: Convert to fraction form
    12,491.31/18,730.47 = 4,591.80/x
  3. Step 3: Cross multiply
    12,491.31x = 18,730.47 × 4,591.80
  4. Step 4: Simplify right side
    12,491.31x = 86,006,572.15
  5. Step 5: Solve for x
    x = 86,006,572.15/12,491.31
  6. Step 6: Final answer
    x = 6,885.31

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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.