Home / 21,087.43-29,080.76-13,536.07

Finding the Fourth Proportional to 21,087.43, 29,080.76 and 13,536.07

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Solution

The fourth proportional to 21,087.43, 29,080.76 and 13,536.07 is: 18,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.43 : 29,080.76 = 13,536.07 : x
  2. Step 2: Convert to fraction form
    21,087.43/29,080.76 = 13,536.07/x
  3. Step 3: Cross multiply
    21,087.43x = 29,080.76 × 13,536.07
  4. Step 4: Simplify right side
    21,087.43x = 393,639,203.01
  5. Step 5: Solve for x
    x = 393,639,203.01/21,087.43
  6. Step 6: Final answer
    x = 18,667.01

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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.