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Finding the Fourth Proportional to 12,590.65, 18,888.73 and 4,157.53

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Solution

The fourth proportional to 12,590.65, 18,888.73 and 4,157.53 is: 6,237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.65 : 18,888.73 = 4,157.53 : x
  2. Step 2: Convert to fraction form
    12,590.65/18,888.73 = 4,157.53/x
  3. Step 3: Cross multiply
    12,590.65x = 18,888.73 × 4,157.53
  4. Step 4: Simplify right side
    12,590.65x = 78,530,395.25
  5. Step 5: Solve for x
    x = 78,530,395.25/12,590.65
  6. Step 6: Final answer
    x = 6,237.20

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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.