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Finding the Fourth Proportional to 27,881.15, 38,465.03 and 15,938.08

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Solution

The fourth proportional to 27,881.15, 38,465.03 and 15,938.08 is: 21,988.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,881.15 : 38,465.03 = 15,938.08 : x
  2. Step 2: Convert to fraction form
    27,881.15/38,465.03 = 15,938.08/x
  3. Step 3: Cross multiply
    27,881.15x = 38,465.03 × 15,938.08
  4. Step 4: Simplify right side
    27,881.15x = 613,058,669.03
  5. Step 5: Solve for x
    x = 613,058,669.03/27,881.15
  6. Step 6: Final answer
    x = 21,988.29

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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.