Home / 13,121.56-19,678.10-4,354.12

Finding the Fourth Proportional to 13,121.56, 19,678.10 and 4,354.12

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Solution

The fourth proportional to 13,121.56, 19,678.10 and 4,354.12 is: 6,529.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.56 : 19,678.10 = 4,354.12 : x
  2. Step 2: Convert to fraction form
    13,121.56/19,678.10 = 4,354.12/x
  3. Step 3: Cross multiply
    13,121.56x = 19,678.10 × 4,354.12
  4. Step 4: Simplify right side
    13,121.56x = 85,680,808.77
  5. Step 5: Solve for x
    x = 85,680,808.77/13,121.56
  6. Step 6: Final answer
    x = 6,529.77

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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.