Home / 5,640.80-7,781.54-3,653.06

Finding the Fourth Proportional to 5,640.80, 7,781.54 and 3,653.06

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Solution

The fourth proportional to 5,640.80, 7,781.54 and 3,653.06 is: 5,039.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.80 : 7,781.54 = 3,653.06 : x
  2. Step 2: Convert to fraction form
    5,640.80/7,781.54 = 3,653.06/x
  3. Step 3: Cross multiply
    5,640.80x = 7,781.54 × 3,653.06
  4. Step 4: Simplify right side
    5,640.80x = 28,426,432.51
  5. Step 5: Solve for x
    x = 28,426,432.51/5,640.80
  6. Step 6: Final answer
    x = 5,039.43

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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.