Home / 12,215.11-16,856.25-6,909.81

Finding the Fourth Proportional to 12,215.11, 16,856.25 and 6,909.81

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Solution

The fourth proportional to 12,215.11, 16,856.25 and 6,909.81 is: 9,535.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.11 : 16,856.25 = 6,909.81 : x
  2. Step 2: Convert to fraction form
    12,215.11/16,856.25 = 6,909.81/x
  3. Step 3: Cross multiply
    12,215.11x = 16,856.25 × 6,909.81
  4. Step 4: Simplify right side
    12,215.11x = 116,473,484.81
  5. Step 5: Solve for x
    x = 116,473,484.81/12,215.11
  6. Step 6: Final answer
    x = 9,535.20

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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.