Home / 13,508.72-18,643.80-7,920.24

Finding the Fourth Proportional to 13,508.72, 18,643.80 and 7,920.24

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Solution

The fourth proportional to 13,508.72, 18,643.80 and 7,920.24 is: 10,930.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.72 : 18,643.80 = 7,920.24 : x
  2. Step 2: Convert to fraction form
    13,508.72/18,643.80 = 7,920.24/x
  3. Step 3: Cross multiply
    13,508.72x = 18,643.80 × 7,920.24
  4. Step 4: Simplify right side
    13,508.72x = 147,663,370.51
  5. Step 5: Solve for x
    x = 147,663,370.51/13,508.72
  6. Step 6: Final answer
    x = 10,930.97

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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.