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Finding the Fourth Proportional to 35,781.53, 53,673.75 and 9,128.21

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Solution

The fourth proportional to 35,781.53, 53,673.75 and 9,128.21 is: 13,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,781.53 : 53,673.75 = 9,128.21 : x
  2. Step 2: Convert to fraction form
    35,781.53/53,673.75 = 9,128.21/x
  3. Step 3: Cross multiply
    35,781.53x = 53,673.75 × 9,128.21
  4. Step 4: Simplify right side
    35,781.53x = 489,945,261.49
  5. Step 5: Solve for x
    x = 489,945,261.49/35,781.53
  6. Step 6: Final answer
    x = 13,692.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.