Home / 21,153.56-31,744.91-13,739.63

Finding the Fourth Proportional to 21,153.56, 31,744.91 and 13,739.63

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Solution

The fourth proportional to 21,153.56, 31,744.91 and 13,739.63 is: 20,618.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.56 : 31,744.91 = 13,739.63 : x
  2. Step 2: Convert to fraction form
    21,153.56/31,744.91 = 13,739.63/x
  3. Step 3: Cross multiply
    21,153.56x = 31,744.91 × 13,739.63
  4. Step 4: Simplify right side
    21,153.56x = 436,163,193.41
  5. Step 5: Solve for x
    x = 436,163,193.41/21,153.56
  6. Step 6: Final answer
    x = 20,618.91

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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.