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Finding the Fourth Proportional to 45,292.05, 67,916.16 and 18,989.73

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Solution

The fourth proportional to 45,292.05, 67,916.16 and 18,989.73 is: 28,475.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,292.05 : 67,916.16 = 18,989.73 : x
  2. Step 2: Convert to fraction form
    45,292.05/67,916.16 = 18,989.73/x
  3. Step 3: Cross multiply
    45,292.05x = 67,916.16 × 18,989.73
  4. Step 4: Simplify right side
    45,292.05x = 1,289,709,541.04
  5. Step 5: Solve for x
    x = 1,289,709,541.04/45,292.05
  6. Step 6: Final answer
    x = 28,475.41

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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.