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Finding the Fourth Proportional to 28,017.60, 38,663.04 and 15,441.60

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Solution

The fourth proportional to 28,017.60, 38,663.04 and 15,441.60 is: 21,308.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,017.60 : 38,663.04 = 15,441.60 : x
  2. Step 2: Convert to fraction form
    28,017.60/38,663.04 = 15,441.60/x
  3. Step 3: Cross multiply
    28,017.60x = 38,663.04 × 15,441.60
  4. Step 4: Simplify right side
    28,017.60x = 597,019,198.46
  5. Step 5: Solve for x
    x = 597,019,198.46/28,017.60
  6. Step 6: Final answer
    x = 21,308.72

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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.