Home / 13,678.05-18,875.75-7,390.43

Finding the Fourth Proportional to 13,678.05, 18,875.75 and 7,390.43

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Solution

The fourth proportional to 13,678.05, 18,875.75 and 7,390.43 is: 10,198.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.05 : 18,875.75 = 7,390.43 : x
  2. Step 2: Convert to fraction form
    13,678.05/18,875.75 = 7,390.43/x
  3. Step 3: Cross multiply
    13,678.05x = 18,875.75 × 7,390.43
  4. Step 4: Simplify right side
    13,678.05x = 139,499,777.74
  5. Step 5: Solve for x
    x = 139,499,777.74/13,678.05
  6. Step 6: Final answer
    x = 10,198.81

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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.