Home / 20,418.79-30,629.34-7,271.17

Finding the Fourth Proportional to 20,418.79, 30,629.34 and 7,271.17

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Solution

The fourth proportional to 20,418.79, 30,629.34 and 7,271.17 is: 10,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.79 : 30,629.34 = 7,271.17 : x
  2. Step 2: Convert to fraction form
    20,418.79/30,629.34 = 7,271.17/x
  3. Step 3: Cross multiply
    20,418.79x = 30,629.34 × 7,271.17
  4. Step 4: Simplify right side
    20,418.79x = 222,710,966.80
  5. Step 5: Solve for x
    x = 222,710,966.80/20,418.79
  6. Step 6: Final answer
    x = 10,907.16

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1.5x scale

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.