Home / 3,945.61-5,445.02-2,153.18

Finding the Fourth Proportional to 3,945.61, 5,445.02 and 2,153.18

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Solution

The fourth proportional to 3,945.61, 5,445.02 and 2,153.18 is: 2,971.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.61 : 5,445.02 = 2,153.18 : x
  2. Step 2: Convert to fraction form
    3,945.61/5,445.02 = 2,153.18/x
  3. Step 3: Cross multiply
    3,945.61x = 5,445.02 × 2,153.18
  4. Step 4: Simplify right side
    3,945.61x = 11,724,127.16
  5. Step 5: Solve for x
    x = 11,724,127.16/3,945.61
  6. Step 6: Final answer
    x = 2,971.43

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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.