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Finding the Fourth Proportional to 13,316.98, 19,978.60 and 3,957.08

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Solution

The fourth proportional to 13,316.98, 19,978.60 and 3,957.08 is: 5,936.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.98 : 19,978.60 = 3,957.08 : x
  2. Step 2: Convert to fraction form
    13,316.98/19,978.60 = 3,957.08/x
  3. Step 3: Cross multiply
    13,316.98x = 19,978.60 × 3,957.08
  4. Step 4: Simplify right side
    13,316.98x = 79,056,918.49
  5. Step 5: Solve for x
    x = 79,056,918.49/13,316.98
  6. Step 6: Final answer
    x = 5,936.55

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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.