Home / 13,838.12-19,089.62-9,120.68

Finding the Fourth Proportional to 13,838.12, 19,089.62 and 9,120.68

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Solution

The fourth proportional to 13,838.12, 19,089.62 and 9,120.68 is: 12,581.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,838.12 : 19,089.62 = 9,120.68 : x
  2. Step 2: Convert to fraction form
    13,838.12/19,089.62 = 9,120.68/x
  3. Step 3: Cross multiply
    13,838.12x = 19,089.62 × 9,120.68
  4. Step 4: Simplify right side
    13,838.12x = 174,110,315.34
  5. Step 5: Solve for x
    x = 174,110,315.34/13,838.12
  6. Step 6: Final answer
    x = 12,581.93

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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.