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Finding the Fourth Proportional to 14,651.51, 21,980.74 and 4,790.76

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Solution

The fourth proportional to 14,651.51, 21,980.74 and 4,790.76 is: 7,187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,651.51 : 21,980.74 = 4,790.76 : x
  2. Step 2: Convert to fraction form
    14,651.51/21,980.74 = 4,790.76/x
  3. Step 3: Cross multiply
    14,651.51x = 21,980.74 × 4,790.76
  4. Step 4: Simplify right side
    14,651.51x = 105,304,449.96
  5. Step 5: Solve for x
    x = 105,304,449.96/14,651.51
  6. Step 6: Final answer
    x = 7,187.28

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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.