Home / 21,005.84-31,507.56-5,424.24

Finding the Fourth Proportional to 21,005.84, 31,507.56 and 5,424.24

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Solution

The fourth proportional to 21,005.84, 31,507.56 and 5,424.24 is: 8,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.84 : 31,507.56 = 5,424.24 : x
  2. Step 2: Convert to fraction form
    21,005.84/31,507.56 = 5,424.24/x
  3. Step 3: Cross multiply
    21,005.84x = 31,507.56 × 5,424.24
  4. Step 4: Simplify right side
    21,005.84x = 170,904,567.25
  5. Step 5: Solve for x
    x = 170,904,567.25/21,005.84
  6. Step 6: Final answer
    x = 8,136.05

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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.