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Finding the Fourth Proportional to 29,291.72, 40,404.30 and 19,220.72

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Solution

The fourth proportional to 29,291.72, 40,404.30 and 19,220.72 is: 26,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,291.72 : 40,404.30 = 19,220.72 : x
  2. Step 2: Convert to fraction form
    29,291.72/40,404.30 = 19,220.72/x
  3. Step 3: Cross multiply
    29,291.72x = 40,404.30 × 19,220.72
  4. Step 4: Simplify right side
    29,291.72x = 776,599,737.10
  5. Step 5: Solve for x
    x = 776,599,737.10/29,291.72
  6. Step 6: Final answer
    x = 26,512.60

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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.