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Finding the Fourth Proportional to 28,104.52, 38,785.02 and 15,530.08

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Solution

The fourth proportional to 28,104.52, 38,785.02 and 15,530.08 is: 21,431.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,104.52 : 38,785.02 = 15,530.08 : x
  2. Step 2: Convert to fraction form
    28,104.52/38,785.02 = 15,530.08/x
  3. Step 3: Cross multiply
    28,104.52x = 38,785.02 × 15,530.08
  4. Step 4: Simplify right side
    28,104.52x = 602,334,463.40
  5. Step 5: Solve for x
    x = 602,334,463.40/28,104.52
  6. Step 6: Final answer
    x = 21,431.94

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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.