Home / 11,947.96-16,488.60-6,643

Finding the Fourth Proportional to 11,947.96, 16,488.60 and 6,643

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Solution

The fourth proportional to 11,947.96, 16,488.60 and 6,643 is: 9,167.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.96 : 16,488.60 = 6,643 : x
  2. Step 2: Convert to fraction form
    11,947.96/16,488.60 = 6,643/x
  3. Step 3: Cross multiply
    11,947.96x = 16,488.60 × 6,643
  4. Step 4: Simplify right side
    11,947.96x = 109,533,769.80
  5. Step 5: Solve for x
    x = 109,533,769.80/11,947.96
  6. Step 6: Final answer
    x = 9,167.57

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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.