Home / 10,947.58-16,421.21-7,428.85

Finding the Fourth Proportional to 10,947.58, 16,421.21 and 7,428.85

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Solution

The fourth proportional to 10,947.58, 16,421.21 and 7,428.85 is: 11,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.58 : 16,421.21 = 7,428.85 : x
  2. Step 2: Convert to fraction form
    10,947.58/16,421.21 = 7,428.85/x
  3. Step 3: Cross multiply
    10,947.58x = 16,421.21 × 7,428.85
  4. Step 4: Simplify right side
    10,947.58x = 121,990,586.66
  5. Step 5: Solve for x
    x = 121,990,586.66/10,947.58
  6. Step 6: Final answer
    x = 11,143.16

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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.