Home / 21,728.05-29,983.67-13,342.93

Finding the Fourth Proportional to 21,728.05, 29,983.67 and 13,342.93

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Solution

The fourth proportional to 21,728.05, 29,983.67 and 13,342.93 is: 18,412.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.05 : 29,983.67 = 13,342.93 : x
  2. Step 2: Convert to fraction form
    21,728.05/29,983.67 = 13,342.93/x
  3. Step 3: Cross multiply
    21,728.05x = 29,983.67 × 13,342.93
  4. Step 4: Simplify right side
    21,728.05x = 400,069,918.32
  5. Step 5: Solve for x
    x = 400,069,918.32/21,728.05
  6. Step 6: Final answer
    x = 18,412.60

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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.