Home / 10,947.45-16,421.01-7,428.71

Finding the Fourth Proportional to 10,947.45, 16,421.01 and 7,428.71

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Solution

The fourth proportional to 10,947.45, 16,421.01 and 7,428.71 is: 11,142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.45 : 16,421.01 = 7,428.71 : x
  2. Step 2: Convert to fraction form
    10,947.45/16,421.01 = 7,428.71/x
  3. Step 3: Cross multiply
    10,947.45x = 16,421.01 × 7,428.71
  4. Step 4: Simplify right side
    10,947.45x = 121,986,839.09
  5. Step 5: Solve for x
    x = 121,986,839.09/10,947.45
  6. Step 6: Final answer
    x = 11,142.95

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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.