Home / 21,492.48-29,661.12-13,107.84

Finding the Fourth Proportional to 21,492.48, 29,661.12 and 13,107.84

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Solution

The fourth proportional to 21,492.48, 29,661.12 and 13,107.84 is: 18,089.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,492.48 : 29,661.12 = 13,107.84 : x
  2. Step 2: Convert to fraction form
    21,492.48/29,661.12 = 13,107.84/x
  3. Step 3: Cross multiply
    21,492.48x = 29,661.12 × 13,107.84
  4. Step 4: Simplify right side
    21,492.48x = 388,793,215.18
  5. Step 5: Solve for x
    x = 388,793,215.18/21,492.48
  6. Step 6: Final answer
    x = 18,089.73

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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.