Home / 21,287.52-29,383.59-13,734.06

Finding the Fourth Proportional to 21,287.52, 29,383.59 and 13,734.06

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Solution

The fourth proportional to 21,287.52, 29,383.59 and 13,734.06 is: 18,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.52 : 29,383.59 = 13,734.06 : x
  2. Step 2: Convert to fraction form
    21,287.52/29,383.59 = 13,734.06/x
  3. Step 3: Cross multiply
    21,287.52x = 29,383.59 × 13,734.06
  4. Step 4: Simplify right side
    21,287.52x = 403,555,988.08
  5. Step 5: Solve for x
    x = 403,555,988.08/21,287.52
  6. Step 6: Final answer
    x = 18,957.40

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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.