Home / 30,647.94-42,278.27-20,579.90

Finding the Fourth Proportional to 30,647.94, 42,278.27 and 20,579.90

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Solution

The fourth proportional to 30,647.94, 42,278.27 and 20,579.90 is: 28,389.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,647.94 : 42,278.27 = 20,579.90 : x
  2. Step 2: Convert to fraction form
    30,647.94/42,278.27 = 20,579.90/x
  3. Step 3: Cross multiply
    30,647.94x = 42,278.27 × 20,579.90
  4. Step 4: Simplify right side
    30,647.94x = 870,082,254.48
  5. Step 5: Solve for x
    x = 870,082,254.48/30,647.94
  6. Step 6: Final answer
    x = 28,389.58

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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.