Home / 12,689.50-19,035.15-3,923.28

Finding the Fourth Proportional to 12,689.50, 19,035.15 and 3,923.28

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Solution

The fourth proportional to 12,689.50, 19,035.15 and 3,923.28 is: 5,885.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.50 : 19,035.15 = 3,923.28 : x
  2. Step 2: Convert to fraction form
    12,689.50/19,035.15 = 3,923.28/x
  3. Step 3: Cross multiply
    12,689.50x = 19,035.15 × 3,923.28
  4. Step 4: Simplify right side
    12,689.50x = 74,680,128.12
  5. Step 5: Solve for x
    x = 74,680,128.12/12,689.50
  6. Step 6: Final answer
    x = 5,885.19

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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.