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Finding the Fourth Proportional to 30,696.64, 45,945.92 and 15,885.20

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Solution

The fourth proportional to 30,696.64, 45,945.92 and 15,885.20 is: 23,776.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,696.64 : 45,945.92 = 15,885.20 : x
  2. Step 2: Convert to fraction form
    30,696.64/45,945.92 = 15,885.20/x
  3. Step 3: Cross multiply
    30,696.64x = 45,945.92 × 15,885.20
  4. Step 4: Simplify right side
    30,696.64x = 729,860,128.38
  5. Step 5: Solve for x
    x = 729,860,128.38/30,696.64
  6. Step 6: Final answer
    x = 23,776.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.