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Finding the Fourth Proportional to 30,611.64, 45,916.56 and 12,851.76

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Solution

The fourth proportional to 30,611.64, 45,916.56 and 12,851.76 is: 19,277.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.64 : 45,916.56 = 12,851.76 : x
  2. Step 2: Convert to fraction form
    30,611.64/45,916.56 = 12,851.76/x
  3. Step 3: Cross multiply
    30,611.64x = 45,916.56 × 12,851.76
  4. Step 4: Simplify right side
    30,611.64x = 590,108,609.15
  5. Step 5: Solve for x
    x = 590,108,609.15/30,611.64
  6. Step 6: Final answer
    x = 19,277.26

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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.