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Finding the Fourth Proportional to 28,016, 38,662.20 and 15,440.48

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Solution

The fourth proportional to 28,016, 38,662.20 and 15,440.48 is: 21,307.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,016 : 38,662.20 = 15,440.48 : x
  2. Step 2: Convert to fraction form
    28,016/38,662.20 = 15,440.48/x
  3. Step 3: Cross multiply
    28,016x = 38,662.20 × 15,440.48
  4. Step 4: Simplify right side
    28,016x = 596,962,925.86
  5. Step 5: Solve for x
    x = 596,962,925.86/28,016
  6. Step 6: Final answer
    x = 21,307.93

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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.