Home / 30,979.23-42,744-18,232.98

Finding the Fourth Proportional to 30,979.23, 42,744 and 18,232.98

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Solution

The fourth proportional to 30,979.23, 42,744 and 18,232.98 is: 25,157.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.23 : 42,744 = 18,232.98 : x
  2. Step 2: Convert to fraction form
    30,979.23/42,744 = 18,232.98/x
  3. Step 3: Cross multiply
    30,979.23x = 42,744 × 18,232.98
  4. Step 4: Simplify right side
    30,979.23x = 779,350,497.12
  5. Step 5: Solve for x
    x = 779,350,497.12/30,979.23
  6. Step 6: Final answer
    x = 25,157.19

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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.