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Finding the Fourth Proportional to 27,703.63, 38,230.81 and 15,128.38

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Solution

The fourth proportional to 27,703.63, 38,230.81 and 15,128.38 is: 20,877.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,703.63 : 38,230.81 = 15,128.38 : x
  2. Step 2: Convert to fraction form
    27,703.63/38,230.81 = 15,128.38/x
  3. Step 3: Cross multiply
    27,703.63x = 38,230.81 × 15,128.38
  4. Step 4: Simplify right side
    27,703.63x = 578,370,221.39
  5. Step 5: Solve for x
    x = 578,370,221.39/27,703.63
  6. Step 6: Final answer
    x = 20,877.06

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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.