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Finding the Fourth Proportional to 5,607.09, 7,728.48 and 5,136.48

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Solution

The fourth proportional to 5,607.09, 7,728.48 and 5,136.48 is: 7,079.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,607.09 : 7,728.48 = 5,136.48 : x
  2. Step 2: Convert to fraction form
    5,607.09/7,728.48 = 5,136.48/x
  3. Step 3: Cross multiply
    5,607.09x = 7,728.48 × 5,136.48
  4. Step 4: Simplify right side
    5,607.09x = 39,697,182.95
  5. Step 5: Solve for x
    x = 39,697,182.95/5,607.09
  6. Step 6: Final answer
    x = 7,079.82

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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.