Home / 21,154.64-31,698.57-7,809.26

Finding the Fourth Proportional to 21,154.64, 31,698.57 and 7,809.26

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Solution

The fourth proportional to 21,154.64, 31,698.57 and 7,809.26 is: 11,701.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.64 : 31,698.57 = 7,809.26 : x
  2. Step 2: Convert to fraction form
    21,154.64/31,698.57 = 7,809.26/x
  3. Step 3: Cross multiply
    21,154.64x = 31,698.57 × 7,809.26
  4. Step 4: Simplify right side
    21,154.64x = 247,542,454.00
  5. Step 5: Solve for x
    x = 247,542,454.00/21,154.64
  6. Step 6: Final answer
    x = 11,701.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.