Home / 13,220.09-18,240.03-8,507.11

Finding the Fourth Proportional to 13,220.09, 18,240.03 and 8,507.11

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Solution

The fourth proportional to 13,220.09, 18,240.03 and 8,507.11 is: 11,737.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.09 : 18,240.03 = 8,507.11 : x
  2. Step 2: Convert to fraction form
    13,220.09/18,240.03 = 8,507.11/x
  3. Step 3: Cross multiply
    13,220.09x = 18,240.03 × 8,507.11
  4. Step 4: Simplify right side
    13,220.09x = 155,169,941.61
  5. Step 5: Solve for x
    x = 155,169,941.61/13,220.09
  6. Step 6: Final answer
    x = 11,737.43

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Double scale
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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.