Home / 13,589.10-18,752.10-7,620.72

Finding the Fourth Proportional to 13,589.10, 18,752.10 and 7,620.72

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Solution

The fourth proportional to 13,589.10, 18,752.10 and 7,620.72 is: 10,516.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,589.10 : 18,752.10 = 7,620.72 : x
  2. Step 2: Convert to fraction form
    13,589.10/18,752.10 = 7,620.72/x
  3. Step 3: Cross multiply
    13,589.10x = 18,752.10 × 7,620.72
  4. Step 4: Simplify right side
    13,589.10x = 142,904,503.51
  5. Step 5: Solve for x
    x = 142,904,503.51/13,589.10
  6. Step 6: Final answer
    x = 10,516.11

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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.