Home / 13,219.59-18,239.34-8,506.61

Finding the Fourth Proportional to 13,219.59, 18,239.34 and 8,506.61

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Solution

The fourth proportional to 13,219.59, 18,239.34 and 8,506.61 is: 11,736.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.59 : 18,239.34 = 8,506.61 : x
  2. Step 2: Convert to fraction form
    13,219.59/18,239.34 = 8,506.61/x
  3. Step 3: Cross multiply
    13,219.59x = 18,239.34 × 8,506.61
  4. Step 4: Simplify right side
    13,219.59x = 155,154,952.04
  5. Step 5: Solve for x
    x = 155,154,952.04/13,219.59
  6. Step 6: Final answer
    x = 11,736.74

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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.