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Finding the Fourth Proportional to 15,018.42, 20,724.59 and 8,303.65

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Solution

The fourth proportional to 15,018.42, 20,724.59 and 8,303.65 is: 11,458.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.42 : 20,724.59 = 8,303.65 : x
  2. Step 2: Convert to fraction form
    15,018.42/20,724.59 = 8,303.65/x
  3. Step 3: Cross multiply
    15,018.42x = 20,724.59 × 8,303.65
  4. Step 4: Simplify right side
    15,018.42x = 172,089,596.61
  5. Step 5: Solve for x
    x = 172,089,596.61/15,018.42
  6. Step 6: Final answer
    x = 11,458.57

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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.