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Finding the Fourth Proportional to 12,355.65, 18,533.94 and 3,590.64

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Solution

The fourth proportional to 12,355.65, 18,533.94 and 3,590.64 is: 5,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.65 : 18,533.94 = 3,590.64 : x
  2. Step 2: Convert to fraction form
    12,355.65/18,533.94 = 3,590.64/x
  3. Step 3: Cross multiply
    12,355.65x = 18,533.94 × 3,590.64
  4. Step 4: Simplify right side
    12,355.65x = 66,548,706.32
  5. Step 5: Solve for x
    x = 66,548,706.32/12,355.65
  6. Step 6: Final answer
    x = 5,386.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.