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Finding the Fourth Proportional to 18,885.81, 28,328.88 and 5,738.19

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Solution

The fourth proportional to 18,885.81, 28,328.88 and 5,738.19 is: 8,607.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.81 : 28,328.88 = 5,738.19 : x
  2. Step 2: Convert to fraction form
    18,885.81/28,328.88 = 5,738.19/x
  3. Step 3: Cross multiply
    18,885.81x = 28,328.88 × 5,738.19
  4. Step 4: Simplify right side
    18,885.81x = 162,556,495.93
  5. Step 5: Solve for x
    x = 162,556,495.93/18,885.81
  6. Step 6: Final answer
    x = 8,607.34

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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.