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Finding the Fourth Proportional to 28,191,394.80, 42,251,662.80 and 13,783,438.80

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Solution

The fourth proportional to 28,191,394.80, 42,251,662.80 and 13,783,438.80 is: 20,657,835.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191,394.80 : 42,251,662.80 = 13,783,438.80 : x
  2. Step 2: Convert to fraction form
    28,191,394.80/42,251,662.80 = 13,783,438.80/x
  3. Step 3: Cross multiply
    28,191,394.80x = 42,251,662.80 × 13,783,438.80
  4. Step 4: Simplify right side
    28,191,394.80x = 582,373,208,402,036.62
  5. Step 5: Solve for x
    x = 582,373,208,402,036.62/28,191,394.80
  6. Step 6: Final answer
    x = 20,657,835.93

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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.