Home / 28,639.50-42,945.20-11,769.45

Finding the Fourth Proportional to 28,639.50, 42,945.20 and 11,769.45

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Solution

The fourth proportional to 28,639.50, 42,945.20 and 11,769.45 is: 17,648.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.50 : 42,945.20 = 11,769.45 : x
  2. Step 2: Convert to fraction form
    28,639.50/42,945.20 = 11,769.45/x
  3. Step 3: Cross multiply
    28,639.50x = 42,945.20 × 11,769.45
  4. Step 4: Simplify right side
    28,639.50x = 505,441,325.29
  5. Step 5: Solve for x
    x = 505,441,325.29/28,639.50
  6. Step 6: Final answer
    x = 17,648.40

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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.