Home / 20,718.64-30,930.26-19,989.64

Finding the Fourth Proportional to 20,718.64, 30,930.26 and 19,989.64

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Solution

The fourth proportional to 20,718.64, 30,930.26 and 19,989.64 is: 29,841.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.64 : 30,930.26 = 19,989.64 : x
  2. Step 2: Convert to fraction form
    20,718.64/30,930.26 = 19,989.64/x
  3. Step 3: Cross multiply
    20,718.64x = 30,930.26 × 19,989.64
  4. Step 4: Simplify right side
    20,718.64x = 618,284,762.51
  5. Step 5: Solve for x
    x = 618,284,762.51/20,718.64
  6. Step 6: Final answer
    x = 29,841.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.