Home / 11,133.68-15,366.36-6,420.68

Finding the Fourth Proportional to 11,133.68, 15,366.36 and 6,420.68

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Solution

The fourth proportional to 11,133.68, 15,366.36 and 6,420.68 is: 8,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,133.68 : 15,366.36 = 6,420.68 : x
  2. Step 2: Convert to fraction form
    11,133.68/15,366.36 = 6,420.68/x
  3. Step 3: Cross multiply
    11,133.68x = 15,366.36 × 6,420.68
  4. Step 4: Simplify right side
    11,133.68x = 98,662,480.32
  5. Step 5: Solve for x
    x = 98,662,480.32/11,133.68
  6. Step 6: Final answer
    x = 8,861.62

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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.