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Finding the Fourth Proportional to 22,307.60, 30,787.06 and 13,355.10

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Solution

The fourth proportional to 22,307.60, 30,787.06 and 13,355.10 is: 18,431.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.60 : 30,787.06 = 13,355.10 : x
  2. Step 2: Convert to fraction form
    22,307.60/30,787.06 = 13,355.10/x
  3. Step 3: Cross multiply
    22,307.60x = 30,787.06 × 13,355.10
  4. Step 4: Simplify right side
    22,307.60x = 411,164,231.62
  5. Step 5: Solve for x
    x = 411,164,231.62/22,307.60
  6. Step 6: Final answer
    x = 18,431.57

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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.