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Finding the Fourth Proportional to 14,490.45, 21,742.65 and 7,090.88

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Solution

The fourth proportional to 14,490.45, 21,742.65 and 7,090.88 is: 10,639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.45 : 21,742.65 = 7,090.88 : x
  2. Step 2: Convert to fraction form
    14,490.45/21,742.65 = 7,090.88/x
  3. Step 3: Cross multiply
    14,490.45x = 21,742.65 × 7,090.88
  4. Step 4: Simplify right side
    14,490.45x = 154,174,413.32
  5. Step 5: Solve for x
    x = 154,174,413.32/14,490.45
  6. Step 6: Final answer
    x = 10,639.73

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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.