Home / 20,999.70-31,463.10-13,600.35

Finding the Fourth Proportional to 20,999.70, 31,463.10 and 13,600.35

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Solution

The fourth proportional to 20,999.70, 31,463.10 and 13,600.35 is: 20,376.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.70 : 31,463.10 = 13,600.35 : x
  2. Step 2: Convert to fraction form
    20,999.70/31,463.10 = 13,600.35/x
  3. Step 3: Cross multiply
    20,999.70x = 31,463.10 × 13,600.35
  4. Step 4: Simplify right side
    20,999.70x = 427,909,172.09
  5. Step 5: Solve for x
    x = 427,909,172.09/20,999.70
  6. Step 6: Final answer
    x = 20,376.92

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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.