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Finding the Fourth Proportional to 21,830,439.60, 30,607,405.20 and 21,830,439.60

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Solution

The fourth proportional to 21,830,439.60, 30,607,405.20 and 21,830,439.60 is: 30,607,405.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830,439.60 : 30,607,405.20 = 21,830,439.60 : x
  2. Step 2: Convert to fraction form
    21,830,439.60/30,607,405.20 = 21,830,439.60/x
  3. Step 3: Cross multiply
    21,830,439.60x = 30,607,405.20 × 21,830,439.60
  4. Step 4: Simplify right side
    21,830,439.60x = 668,173,110,531,326
  5. Step 5: Solve for x
    x = 668,173,110,531,326/21,830,439.60
  6. Step 6: Final answer
    x = 30,607,405.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.