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Finding the Fourth Proportional to 18,508.89, 25,554.65 and 10,957.67

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Solution

The fourth proportional to 18,508.89, 25,554.65 and 10,957.67 is: 15,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.89 : 25,554.65 = 10,957.67 : x
  2. Step 2: Convert to fraction form
    18,508.89/25,554.65 = 10,957.67/x
  3. Step 3: Cross multiply
    18,508.89x = 25,554.65 × 10,957.67
  4. Step 4: Simplify right side
    18,508.89x = 280,019,421.67
  5. Step 5: Solve for x
    x = 280,019,421.67/18,508.89
  6. Step 6: Final answer
    x = 15,128.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.