Home / 15,857.72-21,862.91-13,643.39

Finding the Fourth Proportional to 15,857.72, 21,862.91 and 13,643.39

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Solution

The fourth proportional to 15,857.72, 21,862.91 and 13,643.39 is: 18,810.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.72 : 21,862.91 = 13,643.39 : x
  2. Step 2: Convert to fraction form
    15,857.72/21,862.91 = 13,643.39/x
  3. Step 3: Cross multiply
    15,857.72x = 21,862.91 × 13,643.39
  4. Step 4: Simplify right side
    15,857.72x = 298,284,132.46
  5. Step 5: Solve for x
    x = 298,284,132.46/15,857.72
  6. Step 6: Final answer
    x = 18,810.02

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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.