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Finding the Fourth Proportional to 22,307.65, 30,787.13 and 13,355.15

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Solution

The fourth proportional to 22,307.65, 30,787.13 and 13,355.15 is: 18,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.65 : 30,787.13 = 13,355.15 : x
  2. Step 2: Convert to fraction form
    22,307.65/30,787.13 = 13,355.15/x
  3. Step 3: Cross multiply
    22,307.65x = 30,787.13 × 13,355.15
  4. Step 4: Simplify right side
    22,307.65x = 411,166,518.51
  5. Step 5: Solve for x
    x = 411,166,518.51/22,307.65
  6. Step 6: Final answer
    x = 18,431.64

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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.