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Finding the Fourth Proportional to 28,103.63, 38,783.03 and 15,528.38

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Solution

The fourth proportional to 28,103.63, 38,783.03 and 15,528.38 is: 21,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.63 : 38,783.03 = 15,528.38 : x
  2. Step 2: Convert to fraction form
    28,103.63/38,783.03 = 15,528.38/x
  3. Step 3: Cross multiply
    28,103.63x = 38,783.03 × 15,528.38
  4. Step 4: Simplify right side
    28,103.63x = 602,237,627.39
  5. Step 5: Solve for x
    x = 602,237,627.39/28,103.63
  6. Step 6: Final answer
    x = 21,429.18

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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.