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Finding the Fourth Proportional to 22,407.90, 30,919.44 and 12,974.64

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Solution

The fourth proportional to 22,407.90, 30,919.44 and 12,974.64 is: 17,903.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,407.90 : 30,919.44 = 12,974.64 : x
  2. Step 2: Convert to fraction form
    22,407.90/30,919.44 = 12,974.64/x
  3. Step 3: Cross multiply
    22,407.90x = 30,919.44 × 12,974.64
  4. Step 4: Simplify right side
    22,407.90x = 401,168,603.00
  5. Step 5: Solve for x
    x = 401,168,603.00/22,407.90
  6. Step 6: Final answer
    x = 17,903.00

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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.