Home / 21,829.78-30,125.10-12,398.32

Finding the Fourth Proportional to 21,829.78, 30,125.10 and 12,398.32

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Solution

The fourth proportional to 21,829.78, 30,125.10 and 12,398.32 is: 17,109.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,829.78 : 30,125.10 = 12,398.32 : x
  2. Step 2: Convert to fraction form
    21,829.78/30,125.10 = 12,398.32/x
  3. Step 3: Cross multiply
    21,829.78x = 30,125.10 × 12,398.32
  4. Step 4: Simplify right side
    21,829.78x = 373,500,629.83
  5. Step 5: Solve for x
    x = 373,500,629.83/21,829.78
  6. Step 6: Final answer
    x = 17,109.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.