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Finding the Fourth Proportional to 29,445.59, 40,611.59 and 20,816.51

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Solution

The fourth proportional to 29,445.59, 40,611.59 and 20,816.51 is: 28,710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,445.59 : 40,611.59 = 20,816.51 : x
  2. Step 2: Convert to fraction form
    29,445.59/40,611.59 = 20,816.51/x
  3. Step 3: Cross multiply
    29,445.59x = 40,611.59 × 20,816.51
  4. Step 4: Simplify right side
    29,445.59x = 845,391,262.21
  5. Step 5: Solve for x
    x = 845,391,262.21/29,445.59
  6. Step 6: Final answer
    x = 28,710.29

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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.