Home / 21,456.96-29,621.28-14,745.12

Finding the Fourth Proportional to 21,456.96, 29,621.28 and 14,745.12

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Solution

The fourth proportional to 21,456.96, 29,621.28 and 14,745.12 is: 20,355.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.96 : 29,621.28 = 14,745.12 : x
  2. Step 2: Convert to fraction form
    21,456.96/29,621.28 = 14,745.12/x
  3. Step 3: Cross multiply
    21,456.96x = 29,621.28 × 14,745.12
  4. Step 4: Simplify right side
    21,456.96x = 436,769,328.15
  5. Step 5: Solve for x
    x = 436,769,328.15/21,456.96
  6. Step 6: Final answer
    x = 20,355.60

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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.