Home / 13,293.72-18,345.12-7,919.92

Finding the Fourth Proportional to 13,293.72, 18,345.12 and 7,919.92

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Solution

The fourth proportional to 13,293.72, 18,345.12 and 7,919.92 is: 10,929.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,293.72 : 18,345.12 = 7,919.92 : x
  2. Step 2: Convert to fraction form
    13,293.72/18,345.12 = 7,919.92/x
  3. Step 3: Cross multiply
    13,293.72x = 18,345.12 × 7,919.92
  4. Step 4: Simplify right side
    13,293.72x = 145,291,882.79
  5. Step 5: Solve for x
    x = 145,291,882.79/13,293.72
  6. Step 6: Final answer
    x = 10,929.36

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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.