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Finding the Fourth Proportional to 12,737,985.90, 19,106,978.85 and 12,528,033.90

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Solution

The fourth proportional to 12,737,985.90, 19,106,978.85 and 12,528,033.90 is: 18,792,050.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,737,985.90 : 19,106,978.85 = 12,528,033.90 : x
  2. Step 2: Convert to fraction form
    12,737,985.90/19,106,978.85 = 12,528,033.90/x
  3. Step 3: Cross multiply
    12,737,985.90x = 19,106,978.85 × 12,528,033.90
  4. Step 4: Simplify right side
    12,737,985.90x = 239,372,878,759,383.03
  5. Step 5: Solve for x
    x = 239,372,878,759,383.03/12,737,985.90
  6. Step 6: Final answer
    x = 18,792,050.85

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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.