Home / 13,539.78-20,312.91-6,859.62

Finding the Fourth Proportional to 13,539.78, 20,312.91 and 6,859.62

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Solution

The fourth proportional to 13,539.78, 20,312.91 and 6,859.62 is: 10,291.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.78 : 20,312.91 = 6,859.62 : x
  2. Step 2: Convert to fraction form
    13,539.78/20,312.91 = 6,859.62/x
  3. Step 3: Cross multiply
    13,539.78x = 20,312.91 × 6,859.62
  4. Step 4: Simplify right side
    13,539.78x = 139,338,843.69
  5. Step 5: Solve for x
    x = 139,338,843.69/13,539.78
  6. Step 6: Final answer
    x = 10,291.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.