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Finding the Fourth Proportional to 28,980.97, 43,477.70 and 8,990.06

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Solution

The fourth proportional to 28,980.97, 43,477.70 and 8,990.06 is: 13,487.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.97 : 43,477.70 = 8,990.06 : x
  2. Step 2: Convert to fraction form
    28,980.97/43,477.70 = 8,990.06/x
  3. Step 3: Cross multiply
    28,980.97x = 43,477.70 × 8,990.06
  4. Step 4: Simplify right side
    28,980.97x = 390,867,131.66
  5. Step 5: Solve for x
    x = 390,867,131.66/28,980.97
  6. Step 6: Final answer
    x = 13,487.03

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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.