Home / 21,153.46-29,190.77-12,660.25

Finding the Fourth Proportional to 21,153.46, 29,190.77 and 12,660.25

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Solution

The fourth proportional to 21,153.46, 29,190.77 and 12,660.25 is: 17,470.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.46 : 29,190.77 = 12,660.25 : x
  2. Step 2: Convert to fraction form
    21,153.46/29,190.77 = 12,660.25/x
  3. Step 3: Cross multiply
    21,153.46x = 29,190.77 × 12,660.25
  4. Step 4: Simplify right side
    21,153.46x = 369,562,445.89
  5. Step 5: Solve for x
    x = 369,562,445.89/21,153.46
  6. Step 6: Final answer
    x = 17,470.54

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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.