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Finding the Fourth Proportional to 19,622.40, 29,435.40 and 7,933.20

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Solution

The fourth proportional to 19,622.40, 29,435.40 and 7,933.20 is: 11,900.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,622.40 : 29,435.40 = 7,933.20 : x
  2. Step 2: Convert to fraction form
    19,622.40/29,435.40 = 7,933.20/x
  3. Step 3: Cross multiply
    19,622.40x = 29,435.40 × 7,933.20
  4. Step 4: Simplify right side
    19,622.40x = 233,516,915.28
  5. Step 5: Solve for x
    x = 233,516,915.28/19,622.40
  6. Step 6: Final answer
    x = 11,900.53

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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.