Home / 30,772.02-42,453.92-20,684.48

Finding the Fourth Proportional to 30,772.02, 42,453.92 and 20,684.48

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Solution

The fourth proportional to 30,772.02, 42,453.92 and 20,684.48 is: 28,536.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,772.02 : 42,453.92 = 20,684.48 : x
  2. Step 2: Convert to fraction form
    30,772.02/42,453.92 = 20,684.48/x
  3. Step 3: Cross multiply
    30,772.02x = 42,453.92 × 20,684.48
  4. Step 4: Simplify right side
    30,772.02x = 878,137,259.16
  5. Step 5: Solve for x
    x = 878,137,259.16/30,772.02
  6. Step 6: Final answer
    x = 28,536.87

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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.