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Finding the Fourth Proportional to 27,999, 38,638.62 and 15,426.18

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Solution

The fourth proportional to 27,999, 38,638.62 and 15,426.18 is: 21,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999 : 38,638.62 = 15,426.18 : x
  2. Step 2: Convert to fraction form
    27,999/38,638.62 = 15,426.18/x
  3. Step 3: Cross multiply
    27,999x = 38,638.62 × 15,426.18
  4. Step 4: Simplify right side
    27,999x = 596,046,307.07
  5. Step 5: Solve for x
    x = 596,046,307.07/27,999
  6. Step 6: Final answer
    x = 21,288.13

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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.