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Finding the Fourth Proportional to 18,916.84, 28,376.34 and 5,770.12

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Solution

The fourth proportional to 18,916.84, 28,376.34 and 5,770.12 is: 8,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.84 : 28,376.34 = 5,770.12 : x
  2. Step 2: Convert to fraction form
    18,916.84/28,376.34 = 5,770.12/x
  3. Step 3: Cross multiply
    18,916.84x = 28,376.34 × 5,770.12
  4. Step 4: Simplify right side
    18,916.84x = 163,734,886.96
  5. Step 5: Solve for x
    x = 163,734,886.96/18,916.84
  6. Step 6: Final answer
    x = 8,655.51

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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.