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Finding the Fourth Proportional to 29,420.66, 40,600.40 and 15,991.94

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Solution

The fourth proportional to 29,420.66, 40,600.40 and 15,991.94 is: 22,068.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,420.66 : 40,600.40 = 15,991.94 : x
  2. Step 2: Convert to fraction form
    29,420.66/40,600.40 = 15,991.94/x
  3. Step 3: Cross multiply
    29,420.66x = 40,600.40 × 15,991.94
  4. Step 4: Simplify right side
    29,420.66x = 649,278,877.81
  5. Step 5: Solve for x
    x = 649,278,877.81/29,420.66
  6. Step 6: Final answer
    x = 22,068.81

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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.