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Finding the Fourth Proportional to 22,405.81, 30,916.87 and 14,840.41

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Solution

The fourth proportional to 22,405.81, 30,916.87 and 14,840.41 is: 20,477.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.81 : 30,916.87 = 14,840.41 : x
  2. Step 2: Convert to fraction form
    22,405.81/30,916.87 = 14,840.41/x
  3. Step 3: Cross multiply
    22,405.81x = 30,916.87 × 14,840.41
  4. Step 4: Simplify right side
    22,405.81x = 458,819,026.72
  5. Step 5: Solve for x
    x = 458,819,026.72/22,405.81
  6. Step 6: Final answer
    x = 20,477.68

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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.