Home / 15,236.91-21,053.43-12,579.66

Finding the Fourth Proportional to 15,236.91, 21,053.43 and 12,579.66

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Solution

The fourth proportional to 15,236.91, 21,053.43 and 12,579.66 is: 17,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,236.91 : 21,053.43 = 12,579.66 : x
  2. Step 2: Convert to fraction form
    15,236.91/21,053.43 = 12,579.66/x
  3. Step 3: Cross multiply
    15,236.91x = 21,053.43 × 12,579.66
  4. Step 4: Simplify right side
    15,236.91x = 264,844,991.23
  5. Step 5: Solve for x
    x = 264,844,991.23/15,236.91
  6. Step 6: Final answer
    x = 17,381.80

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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.