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Finding the Fourth Proportional to 28,214.51, 38,936.02 and 15,293.82

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Solution

The fourth proportional to 28,214.51, 38,936.02 and 15,293.82 is: 21,105.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,214.51 : 38,936.02 = 15,293.82 : x
  2. Step 2: Convert to fraction form
    28,214.51/38,936.02 = 15,293.82/x
  3. Step 3: Cross multiply
    28,214.51x = 38,936.02 × 15,293.82
  4. Step 4: Simplify right side
    28,214.51x = 595,480,443.16
  5. Step 5: Solve for x
    x = 595,480,443.16/28,214.51
  6. Step 6: Final answer
    x = 21,105.47

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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.