Home / 13,109.04-19,618.32-8,109.36

Finding the Fourth Proportional to 13,109.04, 19,618.32 and 8,109.36

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Solution

The fourth proportional to 13,109.04, 19,618.32 and 8,109.36 is: 12,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.04 : 19,618.32 = 8,109.36 : x
  2. Step 2: Convert to fraction form
    13,109.04/19,618.32 = 8,109.36/x
  3. Step 3: Cross multiply
    13,109.04x = 19,618.32 × 8,109.36
  4. Step 4: Simplify right side
    13,109.04x = 159,092,019.48
  5. Step 5: Solve for x
    x = 159,092,019.48/13,109.04
  6. Step 6: Final answer
    x = 12,136.05

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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.