Home / 30,701.64-45,974.70-18,979.32

Finding the Fourth Proportional to 30,701.64, 45,974.70 and 18,979.32

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Solution

The fourth proportional to 30,701.64, 45,974.70 and 18,979.32 is: 28,420.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,701.64 : 45,974.70 = 18,979.32 : x
  2. Step 2: Convert to fraction form
    30,701.64/45,974.70 = 18,979.32/x
  3. Step 3: Cross multiply
    30,701.64x = 45,974.70 × 18,979.32
  4. Step 4: Simplify right side
    30,701.64x = 872,568,543.20
  5. Step 5: Solve for x
    x = 872,568,543.20/30,701.64
  6. Step 6: Final answer
    x = 28,420.91

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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.