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Finding the Fourth Proportional to 38,611.05, 57,904.24 and 12,309.63

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Solution

The fourth proportional to 38,611.05, 57,904.24 and 12,309.63 is: 18,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,611.05 : 57,904.24 = 12,309.63 : x
  2. Step 2: Convert to fraction form
    38,611.05/57,904.24 = 12,309.63/x
  3. Step 3: Cross multiply
    38,611.05x = 57,904.24 × 12,309.63
  4. Step 4: Simplify right side
    38,611.05x = 712,779,769.83
  5. Step 5: Solve for x
    x = 712,779,769.83/38,611.05
  6. Step 6: Final answer
    x = 18,460.51

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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.