Home / 21,278.50-31,917.75-5,695.72

Finding the Fourth Proportional to 21,278.50, 31,917.75 and 5,695.72

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Solution

The fourth proportional to 21,278.50, 31,917.75 and 5,695.72 is: 8,543.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.50 : 31,917.75 = 5,695.72 : x
  2. Step 2: Convert to fraction form
    21,278.50/31,917.75 = 5,695.72/x
  3. Step 3: Cross multiply
    21,278.50x = 31,917.75 × 5,695.72
  4. Step 4: Simplify right side
    21,278.50x = 181,794,567.03
  5. Step 5: Solve for x
    x = 181,794,567.03/21,278.50
  6. Step 6: Final answer
    x = 8,543.58

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1.5x scale

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.