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Finding the Fourth Proportional to 5,681.61, 7,840.22 and 3,557.05

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Solution

The fourth proportional to 5,681.61, 7,840.22 and 3,557.05 is: 4,908.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.61 : 7,840.22 = 3,557.05 : x
  2. Step 2: Convert to fraction form
    5,681.61/7,840.22 = 3,557.05/x
  3. Step 3: Cross multiply
    5,681.61x = 7,840.22 × 3,557.05
  4. Step 4: Simplify right side
    5,681.61x = 27,888,054.55
  5. Step 5: Solve for x
    x = 27,888,054.55/5,681.61
  6. Step 6: Final answer
    x = 4,908.48

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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.