Home / 22,405.61-30,930.23-12,972.35

Finding the Fourth Proportional to 22,405.61, 30,930.23 and 12,972.35

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Solution

The fourth proportional to 22,405.61, 30,930.23 and 12,972.35 is: 17,907.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.61 : 30,930.23 = 12,972.35 : x
  2. Step 2: Convert to fraction form
    22,405.61/30,930.23 = 12,972.35/x
  3. Step 3: Cross multiply
    22,405.61x = 30,930.23 × 12,972.35
  4. Step 4: Simplify right side
    22,405.61x = 401,237,646.92
  5. Step 5: Solve for x
    x = 401,237,646.92/22,405.61
  6. Step 6: Final answer
    x = 17,907.91

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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.