Home / 18,935.10-28,402.65-7,840.26

Finding the Fourth Proportional to 18,935.10, 28,402.65 and 7,840.26

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Solution

The fourth proportional to 18,935.10, 28,402.65 and 7,840.26 is: 11,760.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,935.10 : 28,402.65 = 7,840.26 : x
  2. Step 2: Convert to fraction form
    18,935.10/28,402.65 = 7,840.26/x
  3. Step 3: Cross multiply
    18,935.10x = 28,402.65 × 7,840.26
  4. Step 4: Simplify right side
    18,935.10x = 222,684,160.69
  5. Step 5: Solve for x
    x = 222,684,160.69/18,935.10
  6. Step 6: Final answer
    x = 11,760.39

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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.