Home / 11,909.12-16,430.84-6,872.68

Finding the Fourth Proportional to 11,909.12, 16,430.84 and 6,872.68

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Solution

The fourth proportional to 11,909.12, 16,430.84 and 6,872.68 is: 9,482.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909.12 : 16,430.84 = 6,872.68 : x
  2. Step 2: Convert to fraction form
    11,909.12/16,430.84 = 6,872.68/x
  3. Step 3: Cross multiply
    11,909.12x = 16,430.84 × 6,872.68
  4. Step 4: Simplify right side
    11,909.12x = 112,923,905.45
  5. Step 5: Solve for x
    x = 112,923,905.45/11,909.12
  6. Step 6: Final answer
    x = 9,482.14

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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.