Home / 28,439.05-42,640.35-11,810.56

Finding the Fourth Proportional to 28,439.05, 42,640.35 and 11,810.56

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Solution

The fourth proportional to 28,439.05, 42,640.35 and 11,810.56 is: 17,708.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.05 : 42,640.35 = 11,810.56 : x
  2. Step 2: Convert to fraction form
    28,439.05/42,640.35 = 11,810.56/x
  3. Step 3: Cross multiply
    28,439.05x = 42,640.35 × 11,810.56
  4. Step 4: Simplify right side
    28,439.05x = 503,606,374.37
  5. Step 5: Solve for x
    x = 503,606,374.37/28,439.05
  6. Step 6: Final answer
    x = 17,708.27

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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.