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Finding the Fourth Proportional to 18,781,786.60, 28,206,894.30 and 16,430,324.20

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Solution

The fourth proportional to 18,781,786.60, 28,206,894.30 and 16,430,324.20 is: 24,675,417.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781,786.60 : 28,206,894.30 = 16,430,324.20 : x
  2. Step 2: Convert to fraction form
    18,781,786.60/28,206,894.30 = 16,430,324.20/x
  3. Step 3: Cross multiply
    18,781,786.60x = 28,206,894.30 × 16,430,324.20
  4. Step 4: Simplify right side
    18,781,786.60x = 463,448,418,024,132.06
  5. Step 5: Solve for x
    x = 463,448,418,024,132.06/18,781,786.60
  6. Step 6: Final answer
    x = 24,675,417.09

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1.5x scale

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.