Home / 13,078.12-18,048.01-7,109.81

Finding the Fourth Proportional to 13,078.12, 18,048.01 and 7,109.81

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Solution

The fourth proportional to 13,078.12, 18,048.01 and 7,109.81 is: 9,811.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.12 : 18,048.01 = 7,109.81 : x
  2. Step 2: Convert to fraction form
    13,078.12/18,048.01 = 7,109.81/x
  3. Step 3: Cross multiply
    13,078.12x = 18,048.01 × 7,109.81
  4. Step 4: Simplify right side
    13,078.12x = 128,317,874.98
  5. Step 5: Solve for x
    x = 128,317,874.98/13,078.12
  6. Step 6: Final answer
    x = 9,811.65

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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.