Home / 21,395.07-29,536.85-12,899.38

Finding the Fourth Proportional to 21,395.07, 29,536.85 and 12,899.38

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Solution

The fourth proportional to 21,395.07, 29,536.85 and 12,899.38 is: 17,808.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,395.07 : 29,536.85 = 12,899.38 : x
  2. Step 2: Convert to fraction form
    21,395.07/29,536.85 = 12,899.38/x
  3. Step 3: Cross multiply
    21,395.07x = 29,536.85 × 12,899.38
  4. Step 4: Simplify right side
    21,395.07x = 381,007,052.15
  5. Step 5: Solve for x
    x = 381,007,052.15/21,395.07
  6. Step 6: Final answer
    x = 17,808.17

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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.