Home / 18,933.96-26,129.75-10,978.68

Finding the Fourth Proportional to 18,933.96, 26,129.75 and 10,978.68

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Solution

The fourth proportional to 18,933.96, 26,129.75 and 10,978.68 is: 15,151.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933.96 : 26,129.75 = 10,978.68 : x
  2. Step 2: Convert to fraction form
    18,933.96/26,129.75 = 10,978.68/x
  3. Step 3: Cross multiply
    18,933.96x = 26,129.75 × 10,978.68
  4. Step 4: Simplify right side
    18,933.96x = 286,870,108.84
  5. Step 5: Solve for x
    x = 286,870,108.84/18,933.96
  6. Step 6: Final answer
    x = 15,151.09

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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.