Home / 21,730.24-29,986.69-13,345.12

Finding the Fourth Proportional to 21,730.24, 29,986.69 and 13,345.12

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Solution

The fourth proportional to 21,730.24, 29,986.69 and 13,345.12 is: 18,415.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.24 : 29,986.69 = 13,345.12 : x
  2. Step 2: Convert to fraction form
    21,730.24/29,986.69 = 13,345.12/x
  3. Step 3: Cross multiply
    21,730.24x = 29,986.69 × 13,345.12
  4. Step 4: Simplify right side
    21,730.24x = 400,175,759.79
  5. Step 5: Solve for x
    x = 400,175,759.79/21,730.24
  6. Step 6: Final answer
    x = 18,415.62

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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.