Home / 15,914.43-21,946.01-13,521.78

Finding the Fourth Proportional to 15,914.43, 21,946.01 and 13,521.78

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Solution

The fourth proportional to 15,914.43, 21,946.01 and 13,521.78 is: 18,646.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,914.43 : 21,946.01 = 13,521.78 : x
  2. Step 2: Convert to fraction form
    15,914.43/21,946.01 = 13,521.78/x
  3. Step 3: Cross multiply
    15,914.43x = 21,946.01 × 13,521.78
  4. Step 4: Simplify right side
    15,914.43x = 296,749,051.49
  5. Step 5: Solve for x
    x = 296,749,051.49/15,914.43
  6. Step 6: Final answer
    x = 18,646.54

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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.