Home / 12,990.36-19,502.31-11,153.28

Finding the Fourth Proportional to 12,990.36, 19,502.31 and 11,153.28

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Solution

The fourth proportional to 12,990.36, 19,502.31 and 11,153.28 is: 16,744.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.36 : 19,502.31 = 11,153.28 : x
  2. Step 2: Convert to fraction form
    12,990.36/19,502.31 = 11,153.28/x
  3. Step 3: Cross multiply
    12,990.36x = 19,502.31 × 11,153.28
  4. Step 4: Simplify right side
    12,990.36x = 217,514,724.08
  5. Step 5: Solve for x
    x = 217,514,724.08/12,990.36
  6. Step 6: Final answer
    x = 16,744.32

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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.