Home / 14,490.09-19,976.70-12,388.20

Finding the Fourth Proportional to 14,490.09, 19,976.70 and 12,388.20

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Solution

The fourth proportional to 14,490.09, 19,976.70 and 12,388.20 is: 17,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.09 : 19,976.70 = 12,388.20 : x
  2. Step 2: Convert to fraction form
    14,490.09/19,976.70 = 12,388.20/x
  3. Step 3: Cross multiply
    14,490.09x = 19,976.70 × 12,388.20
  4. Step 4: Simplify right side
    14,490.09x = 247,475,402.60
  5. Step 5: Solve for x
    x = 247,475,402.60/14,490.09
  6. Step 6: Final answer
    x = 17,078.94

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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.