Home / 18,930.06-26,119.53-10,971.81

Finding the Fourth Proportional to 18,930.06, 26,119.53 and 10,971.81

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Solution

The fourth proportional to 18,930.06, 26,119.53 and 10,971.81 is: 15,138.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.06 : 26,119.53 = 10,971.81 : x
  2. Step 2: Convert to fraction form
    18,930.06/26,119.53 = 10,971.81/x
  3. Step 3: Cross multiply
    18,930.06x = 26,119.53 × 10,971.81
  4. Step 4: Simplify right side
    18,930.06x = 286,578,520.45
  5. Step 5: Solve for x
    x = 286,578,520.45/18,930.06
  6. Step 6: Final answer
    x = 15,138.81

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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.