Home / 9,402.48-12,970.81-7,909.85

Finding the Fourth Proportional to 9,402.48, 12,970.81 and 7,909.85

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Solution

The fourth proportional to 9,402.48, 12,970.81 and 7,909.85 is: 10,911.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,402.48 : 12,970.81 = 7,909.85 : x
  2. Step 2: Convert to fraction form
    9,402.48/12,970.81 = 7,909.85/x
  3. Step 3: Cross multiply
    9,402.48x = 12,970.81 × 7,909.85
  4. Step 4: Simplify right side
    9,402.48x = 102,597,161.48
  5. Step 5: Solve for x
    x = 102,597,161.48/9,402.48
  6. Step 6: Final answer
    x = 10,911.71

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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.