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Finding the Fourth Proportional to 28,686.80, 43,030.20 and 21,774.80

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Solution

The fourth proportional to 28,686.80, 43,030.20 and 21,774.80 is: 32,662.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.80 : 43,030.20 = 21,774.80 : x
  2. Step 2: Convert to fraction form
    28,686.80/43,030.20 = 21,774.80/x
  3. Step 3: Cross multiply
    28,686.80x = 43,030.20 × 21,774.80
  4. Step 4: Simplify right side
    28,686.80x = 936,973,998.96
  5. Step 5: Solve for x
    x = 936,973,998.96/28,686.80
  6. Step 6: Final answer
    x = 32,662.20

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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.