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Finding the Fourth Proportional to 14,415.90, 21,618.90 and 7,015.62

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Solution

The fourth proportional to 14,415.90, 21,618.90 and 7,015.62 is: 10,521.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,415.90 : 21,618.90 = 7,015.62 : x
  2. Step 2: Convert to fraction form
    14,415.90/21,618.90 = 7,015.62/x
  3. Step 3: Cross multiply
    14,415.90x = 21,618.90 × 7,015.62
  4. Step 4: Simplify right side
    14,415.90x = 151,669,987.22
  5. Step 5: Solve for x
    x = 151,669,987.22/14,415.90
  6. Step 6: Final answer
    x = 10,521.02

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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.