Home / 18,929.07-28,393.47-4,887.90

Finding the Fourth Proportional to 18,929.07, 28,393.47 and 4,887.90

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Solution

The fourth proportional to 18,929.07, 28,393.47 and 4,887.90 is: 7,331.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.07 : 28,393.47 = 4,887.90 : x
  2. Step 2: Convert to fraction form
    18,929.07/28,393.47 = 4,887.90/x
  3. Step 3: Cross multiply
    18,929.07x = 28,393.47 × 4,887.90
  4. Step 4: Simplify right side
    18,929.07x = 138,784,442.01
  5. Step 5: Solve for x
    x = 138,784,442.01/18,929.07
  6. Step 6: Final answer
    x = 7,331.82

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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.