Home / 28,128,086.40-42,192,129.60-18,386,313.60

Finding the Fourth Proportional to 28,128,086.40, 42,192,129.60 and 18,386,313.60

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Solution

The fourth proportional to 28,128,086.40, 42,192,129.60 and 18,386,313.60 is: 27,579,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128,086.40 : 42,192,129.60 = 18,386,313.60 : x
  2. Step 2: Convert to fraction form
    28,128,086.40/42,192,129.60 = 18,386,313.60/x
  3. Step 3: Cross multiply
    28,128,086.40x = 42,192,129.60 × 18,386,313.60
  4. Step 4: Simplify right side
    28,128,086.40x = 775,757,726,277,442.62
  5. Step 5: Solve for x
    x = 775,757,726,277,442.62/28,128,086.40
  6. Step 6: Final answer
    x = 27,579,470.40

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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.