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Finding the Fourth Proportional to 18,805,989.60, 28,208,984.40 and 17,672,248.80

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Solution

The fourth proportional to 18,805,989.60, 28,208,984.40 and 17,672,248.80 is: 26,508,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805,989.60 : 28,208,984.40 = 17,672,248.80 : x
  2. Step 2: Convert to fraction form
    18,805,989.60/28,208,984.40 = 17,672,248.80/x
  3. Step 3: Cross multiply
    18,805,989.60x = 28,208,984.40 × 17,672,248.80
  4. Step 4: Simplify right side
    18,805,989.60x = 498,516,190,712,118.69
  5. Step 5: Solve for x
    x = 498,516,190,712,118.69/18,805,989.60
  6. Step 6: Final answer
    x = 26,508,373.20

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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.