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Finding the Fourth Proportional to 18,951.84, 28,432.44 and 5,803.56

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Solution

The fourth proportional to 18,951.84, 28,432.44 and 5,803.56 is: 8,706.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.84 : 28,432.44 = 5,803.56 : x
  2. Step 2: Convert to fraction form
    18,951.84/28,432.44 = 5,803.56/x
  3. Step 3: Cross multiply
    18,951.84x = 28,432.44 × 5,803.56
  4. Step 4: Simplify right side
    18,951.84x = 165,009,371.49
  5. Step 5: Solve for x
    x = 165,009,371.49/18,951.84
  6. Step 6: Final answer
    x = 8,706.77

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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.