Home / 13,115.04-18,111.57-11,215.62

Finding the Fourth Proportional to 13,115.04, 18,111.57 and 11,215.62

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Solution

The fourth proportional to 13,115.04, 18,111.57 and 11,215.62 is: 15,488.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.04 : 18,111.57 = 11,215.62 : x
  2. Step 2: Convert to fraction form
    13,115.04/18,111.57 = 11,215.62/x
  3. Step 3: Cross multiply
    13,115.04x = 18,111.57 × 11,215.62
  4. Step 4: Simplify right side
    13,115.04x = 203,132,486.72
  5. Step 5: Solve for x
    x = 203,132,486.72/13,115.04
  6. Step 6: Final answer
    x = 15,488.51

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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.