Home / 21,318,853.60-31,978,280.40-19,303,314.40

Finding the Fourth Proportional to 21,318,853.60, 31,978,280.40 and 19,303,314.40

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Solution

The fourth proportional to 21,318,853.60, 31,978,280.40 and 19,303,314.40 is: 28,954,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318,853.60 : 31,978,280.40 = 19,303,314.40 : x
  2. Step 2: Convert to fraction form
    21,318,853.60/31,978,280.40 = 19,303,314.40/x
  3. Step 3: Cross multiply
    21,318,853.60x = 31,978,280.40 × 19,303,314.40
  4. Step 4: Simplify right side
    21,318,853.60x = 617,286,800,532,557.62
  5. Step 5: Solve for x
    x = 617,286,800,532,557.62/21,318,853.60
  6. Step 6: Final answer
    x = 28,954,971.60

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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.