Home / 10,920.81-15,070.11-6,443.54

Finding the Fourth Proportional to 10,920.81, 15,070.11 and 6,443.54

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Solution

The fourth proportional to 10,920.81, 15,070.11 and 6,443.54 is: 8,891.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.81 : 15,070.11 = 6,443.54 : x
  2. Step 2: Convert to fraction form
    10,920.81/15,070.11 = 6,443.54/x
  3. Step 3: Cross multiply
    10,920.81x = 15,070.11 × 6,443.54
  4. Step 4: Simplify right side
    10,920.81x = 97,104,856.59
  5. Step 5: Solve for x
    x = 97,104,856.59/10,920.81
  6. Step 6: Final answer
    x = 8,891.73

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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.