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Finding the Fourth Proportional to 18,347,985.60, 27,521,978.40 and 16,521,403.20

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Solution

The fourth proportional to 18,347,985.60, 27,521,978.40 and 16,521,403.20 is: 24,782,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347,985.60 : 27,521,978.40 = 16,521,403.20 : x
  2. Step 2: Convert to fraction form
    18,347,985.60/27,521,978.40 = 16,521,403.20/x
  3. Step 3: Cross multiply
    18,347,985.60x = 27,521,978.40 × 16,521,403.20
  4. Step 4: Simplify right side
    18,347,985.60x = 454,701,702,008,090.81
  5. Step 5: Solve for x
    x = 454,701,702,008,090.81/18,347,985.60
  6. Step 6: Final answer
    x = 24,782,104.80

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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.