Home / 28,077.50-42,120.34-11,438.55

Finding the Fourth Proportional to 28,077.50, 42,120.34 and 11,438.55

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Solution

The fourth proportional to 28,077.50, 42,120.34 and 11,438.55 is: 17,159.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,077.50 : 42,120.34 = 11,438.55 : x
  2. Step 2: Convert to fraction form
    28,077.50/42,120.34 = 11,438.55/x
  3. Step 3: Cross multiply
    28,077.50x = 42,120.34 × 11,438.55
  4. Step 4: Simplify right side
    28,077.50x = 481,795,586.51
  5. Step 5: Solve for x
    x = 481,795,586.51/28,077.50
  6. Step 6: Final answer
    x = 17,159.49

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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.