Home / 13,115.84-18,088.04-8,399.21

Finding the Fourth Proportional to 13,115.84, 18,088.04 and 8,399.21

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Solution

The fourth proportional to 13,115.84, 18,088.04 and 8,399.21 is: 11,583.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.84 : 18,088.04 = 8,399.21 : x
  2. Step 2: Convert to fraction form
    13,115.84/18,088.04 = 8,399.21/x
  3. Step 3: Cross multiply
    13,115.84x = 18,088.04 × 8,399.21
  4. Step 4: Simplify right side
    13,115.84x = 151,925,177.01
  5. Step 5: Solve for x
    x = 151,925,177.01/13,115.84
  6. Step 6: Final answer
    x = 11,583.34

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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.