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Finding the Fourth Proportional to 18,784,745.40, 28,139,793.30 and 10,249,807.80

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Solution

The fourth proportional to 18,784,745.40, 28,139,793.30 and 10,249,807.80 is: 15,354,345.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784,745.40 : 28,139,793.30 = 10,249,807.80 : x
  2. Step 2: Convert to fraction form
    18,784,745.40/28,139,793.30 = 10,249,807.80/x
  3. Step 3: Cross multiply
    18,784,745.40x = 28,139,793.30 × 10,249,807.80
  4. Step 4: Simplify right side
    18,784,745.40x = 288,427,472,856,727.75
  5. Step 5: Solve for x
    x = 288,427,472,856,727.75/18,784,745.40
  6. Step 6: Final answer
    x = 15,354,345.60

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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.