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Finding the Fourth Proportional to 18,687,641.60, 28,031,462.40 and 18,372,713.60

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Solution

The fourth proportional to 18,687,641.60, 28,031,462.40 and 18,372,713.60 is: 27,559,070.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,641.60 : 28,031,462.40 = 18,372,713.60 : x
  2. Step 2: Convert to fraction form
    18,687,641.60/28,031,462.40 = 18,372,713.60/x
  3. Step 3: Cross multiply
    18,687,641.60x = 28,031,462.40 × 18,372,713.60
  4. Step 4: Simplify right side
    18,687,641.60x = 515,014,030,464,368.62
  5. Step 5: Solve for x
    x = 515,014,030,464,368.62/18,687,641.60
  6. Step 6: Final answer
    x = 27,559,070.40

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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.