Home / 18,929.12-26,120.66-10,971.86

Finding the Fourth Proportional to 18,929.12, 26,120.66 and 10,971.86

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Solution

The fourth proportional to 18,929.12, 26,120.66 and 10,971.86 is: 15,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.12 : 26,120.66 = 10,971.86 : x
  2. Step 2: Convert to fraction form
    18,929.12/26,120.66 = 10,971.86/x
  3. Step 3: Cross multiply
    18,929.12x = 26,120.66 × 10,971.86
  4. Step 4: Simplify right side
    18,929.12x = 286,592,039.17
  5. Step 5: Solve for x
    x = 286,592,039.17/18,929.12
  6. Step 6: Final answer
    x = 15,140.28

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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.