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Finding the Fourth Proportional to 28,605,623.60, 42,908,435.40 and 19,996,279.40

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Solution

The fourth proportional to 28,605,623.60, 42,908,435.40 and 19,996,279.40 is: 29,994,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605,623.60 : 42,908,435.40 = 19,996,279.40 : x
  2. Step 2: Convert to fraction form
    28,605,623.60/42,908,435.40 = 19,996,279.40/x
  3. Step 3: Cross multiply
    28,605,623.60x = 42,908,435.40 × 19,996,279.40
  4. Step 4: Simplify right side
    28,605,623.60x = 858,009,062,875,250.62
  5. Step 5: Solve for x
    x = 858,009,062,875,250.62/28,605,623.60
  6. Step 6: Final answer
    x = 29,994,419.10

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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.