Home / 8,502.40-11,709.12-6,140.80

Finding the Fourth Proportional to 8,502.40, 11,709.12 and 6,140.80

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Solution

The fourth proportional to 8,502.40, 11,709.12 and 6,140.80 is: 8,456.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,502.40 : 11,709.12 = 6,140.80 : x
  2. Step 2: Convert to fraction form
    8,502.40/11,709.12 = 6,140.80/x
  3. Step 3: Cross multiply
    8,502.40x = 11,709.12 × 6,140.80
  4. Step 4: Simplify right side
    8,502.40x = 71,903,364.10
  5. Step 5: Solve for x
    x = 71,903,364.10/8,502.40
  6. Step 6: Final answer
    x = 8,456.83

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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.