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Finding the Fourth Proportional to 20,409,978.40, 30,572,977.20 and 10,318,285.60

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Solution

The fourth proportional to 20,409,978.40, 30,572,977.20 and 10,318,285.60 is: 15,456,200.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409,978.40 : 30,572,977.20 = 10,318,285.60 : x
  2. Step 2: Convert to fraction form
    20,409,978.40/30,572,977.20 = 10,318,285.60/x
  3. Step 3: Cross multiply
    20,409,978.40x = 30,572,977.20 × 10,318,285.60
  4. Step 4: Simplify right side
    20,409,978.40x = 315,460,710,391,888.31
  5. Step 5: Solve for x
    x = 315,460,710,391,888.31/20,409,978.40
  6. Step 6: Final answer
    x = 15,456,200.11

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.