Home / 21,515.04-29,689.68-13,019.04

Finding the Fourth Proportional to 21,515.04, 29,689.68 and 13,019.04

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Solution

The fourth proportional to 21,515.04, 29,689.68 and 13,019.04 is: 17,965.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.04 : 29,689.68 = 13,019.04 : x
  2. Step 2: Convert to fraction form
    21,515.04/29,689.68 = 13,019.04/x
  3. Step 3: Cross multiply
    21,515.04x = 29,689.68 × 13,019.04
  4. Step 4: Simplify right side
    21,515.04x = 386,531,131.51
  5. Step 5: Solve for x
    x = 386,531,131.51/21,515.04
  6. Step 6: Final answer
    x = 17,965.62

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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.