Home / 21,006.56-31,509.86-5,424.19

Finding the Fourth Proportional to 21,006.56, 31,509.86 and 5,424.19

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Solution

The fourth proportional to 21,006.56, 31,509.86 and 5,424.19 is: 8,136.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.56 : 31,509.86 = 5,424.19 : x
  2. Step 2: Convert to fraction form
    21,006.56/31,509.86 = 5,424.19/x
  3. Step 3: Cross multiply
    21,006.56x = 31,509.86 × 5,424.19
  4. Step 4: Simplify right side
    21,006.56x = 170,915,361.62
  5. Step 5: Solve for x
    x = 170,915,361.62/21,006.56
  6. Step 6: Final answer
    x = 8,136.28

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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.