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Finding the Fourth Proportional to 20,657,430.60, 30,986,145.90 and 19,481,699.40

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Solution

The fourth proportional to 20,657,430.60, 30,986,145.90 and 19,481,699.40 is: 29,222,549.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657,430.60 : 30,986,145.90 = 19,481,699.40 : x
  2. Step 2: Convert to fraction form
    20,657,430.60/30,986,145.90 = 19,481,699.40/x
  3. Step 3: Cross multiply
    20,657,430.60x = 30,986,145.90 × 19,481,699.40
  4. Step 4: Simplify right side
    20,657,430.60x = 603,662,779,988,342.38
  5. Step 5: Solve for x
    x = 603,662,779,988,342.38/20,657,430.60
  6. Step 6: Final answer
    x = 29,222,549.10

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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.