Home / 21,228.48-31,829.22-10,129.32

Finding the Fourth Proportional to 21,228.48, 31,829.22 and 10,129.32

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Solution

The fourth proportional to 21,228.48, 31,829.22 and 10,129.32 is: 15,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.48 : 31,829.22 = 10,129.32 : x
  2. Step 2: Convert to fraction form
    21,228.48/31,829.22 = 10,129.32/x
  3. Step 3: Cross multiply
    21,228.48x = 31,829.22 × 10,129.32
  4. Step 4: Simplify right side
    21,228.48x = 322,408,354.73
  5. Step 5: Solve for x
    x = 322,408,354.73/21,228.48
  6. Step 6: Final answer
    x = 15,187.54

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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.