Home / 15,942.72-21,997.80-9,655.68

Finding the Fourth Proportional to 15,942.72, 21,997.80 and 9,655.68

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Solution

The fourth proportional to 15,942.72, 21,997.80 and 9,655.68 is: 13,322.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,942.72 : 21,997.80 = 9,655.68 : x
  2. Step 2: Convert to fraction form
    15,942.72/21,997.80 = 9,655.68/x
  3. Step 3: Cross multiply
    15,942.72x = 21,997.80 × 9,655.68
  4. Step 4: Simplify right side
    15,942.72x = 212,403,717.50
  5. Step 5: Solve for x
    x = 212,403,717.50/15,942.72
  6. Step 6: Final answer
    x = 13,322.93

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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.