Home / 21,153.72-31,707.64-13,763.44

Finding the Fourth Proportional to 21,153.72, 31,707.64 and 13,763.44

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Solution

The fourth proportional to 21,153.72, 31,707.64 and 13,763.44 is: 20,630.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.72 : 31,707.64 = 13,763.44 : x
  2. Step 2: Convert to fraction form
    21,153.72/31,707.64 = 13,763.44/x
  3. Step 3: Cross multiply
    21,153.72x = 31,707.64 × 13,763.44
  4. Step 4: Simplify right side
    21,153.72x = 436,406,200.68
  5. Step 5: Solve for x
    x = 436,406,200.68/21,153.72
  6. Step 6: Final answer
    x = 20,630.23

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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.