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Finding the Fourth Proportional to 19,007,985.60, 28,511,978.40 and 8,391,153.60

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Solution

The fourth proportional to 19,007,985.60, 28,511,978.40 and 8,391,153.60 is: 12,586,730.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007,985.60 : 28,511,978.40 = 8,391,153.60 : x
  2. Step 2: Convert to fraction form
    19,007,985.60/28,511,978.40 = 8,391,153.60/x
  3. Step 3: Cross multiply
    19,007,985.60x = 28,511,978.40 × 8,391,153.60
  4. Step 4: Simplify right side
    19,007,985.60x = 239,248,390,194,282.22
  5. Step 5: Solve for x
    x = 239,248,390,194,282.22/19,007,985.60
  6. Step 6: Final answer
    x = 12,586,730.40

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Similar ratio
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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.