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Finding the Fourth Proportional to 28,611.54, 42,921.96 and 8,894.67

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Solution

The fourth proportional to 28,611.54, 42,921.96 and 8,894.67 is: 13,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.54 : 42,921.96 = 8,894.67 : x
  2. Step 2: Convert to fraction form
    28,611.54/42,921.96 = 8,894.67/x
  3. Step 3: Cross multiply
    28,611.54x = 42,921.96 × 8,894.67
  4. Step 4: Simplify right side
    28,611.54x = 381,776,669.95
  5. Step 5: Solve for x
    x = 381,776,669.95/28,611.54
  6. Step 6: Final answer
    x = 13,343.45

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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.