Home / 19,981.62-29,970.39-12,563.61

Finding the Fourth Proportional to 19,981.62, 29,970.39 and 12,563.61

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Solution

The fourth proportional to 19,981.62, 29,970.39 and 12,563.61 is: 18,844.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.62 : 29,970.39 = 12,563.61 : x
  2. Step 2: Convert to fraction form
    19,981.62/29,970.39 = 12,563.61/x
  3. Step 3: Cross multiply
    19,981.62x = 29,970.39 × 12,563.61
  4. Step 4: Simplify right side
    19,981.62x = 376,536,291.51
  5. Step 5: Solve for x
    x = 376,536,291.51/19,981.62
  6. Step 6: Final answer
    x = 18,844.13

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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.