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Finding the Fourth Proportional to 15,762.15, 21,750.53 and 9,791.91

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Solution

The fourth proportional to 15,762.15, 21,750.53 and 9,791.91 is: 13,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,762.15 : 21,750.53 = 9,791.91 : x
  2. Step 2: Convert to fraction form
    15,762.15/21,750.53 = 9,791.91/x
  3. Step 3: Cross multiply
    15,762.15x = 21,750.53 × 9,791.91
  4. Step 4: Simplify right side
    15,762.15x = 212,979,183.25
  5. Step 5: Solve for x
    x = 212,979,183.25/15,762.15
  6. Step 6: Final answer
    x = 13,512.06

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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.