Home / 12,753.32-19,128.90-4,431.20

Finding the Fourth Proportional to 12,753.32, 19,128.90 and 4,431.20

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Solution

The fourth proportional to 12,753.32, 19,128.90 and 4,431.20 is: 6,646.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,753.32 : 19,128.90 = 4,431.20 : x
  2. Step 2: Convert to fraction form
    12,753.32/19,128.90 = 4,431.20/x
  3. Step 3: Cross multiply
    12,753.32x = 19,128.90 × 4,431.20
  4. Step 4: Simplify right side
    12,753.32x = 84,763,981.68
  5. Step 5: Solve for x
    x = 84,763,981.68/12,753.32
  6. Step 6: Final answer
    x = 6,646.42

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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.