Home / 19,312,999.80-28,969,499.70-12,129,579.60

Finding the Fourth Proportional to 19,312,999.80, 28,969,499.70 and 12,129,579.60

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Solution

The fourth proportional to 19,312,999.80, 28,969,499.70 and 12,129,579.60 is: 18,194,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,312,999.80 : 28,969,499.70 = 12,129,579.60 : x
  2. Step 2: Convert to fraction form
    19,312,999.80/28,969,499.70 = 12,129,579.60/x
  3. Step 3: Cross multiply
    19,312,999.80x = 28,969,499.70 × 12,129,579.60
  4. Step 4: Simplify right side
    19,312,999.80x = 351,387,852,583,326.12
  5. Step 5: Solve for x
    x = 351,387,852,583,326.12/19,312,999.80
  6. Step 6: Final answer
    x = 18,194,369.40

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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.