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Finding the Fourth Proportional to 30,662.68, 42,316.01 and 18,724.09

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Solution

The fourth proportional to 30,662.68, 42,316.01 and 18,724.09 is: 25,840.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,662.68 : 42,316.01 = 18,724.09 : x
  2. Step 2: Convert to fraction form
    30,662.68/42,316.01 = 18,724.09/x
  3. Step 3: Cross multiply
    30,662.68x = 42,316.01 × 18,724.09
  4. Step 4: Simplify right side
    30,662.68x = 792,328,779.68
  5. Step 5: Solve for x
    x = 792,328,779.68/30,662.68
  6. Step 6: Final answer
    x = 25,840.17

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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.