Home / 12,912,187.40-19,368,281.10-11,938,977.80

Finding the Fourth Proportional to 12,912,187.40, 19,368,281.10 and 11,938,977.80

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Solution

The fourth proportional to 12,912,187.40, 19,368,281.10 and 11,938,977.80 is: 17,908,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912,187.40 : 19,368,281.10 = 11,938,977.80 : x
  2. Step 2: Convert to fraction form
    12,912,187.40/19,368,281.10 = 11,938,977.80/x
  3. Step 3: Cross multiply
    12,912,187.40x = 19,368,281.10 × 11,938,977.80
  4. Step 4: Simplify right side
    12,912,187.40x = 231,237,478,077,059.62
  5. Step 5: Solve for x
    x = 231,237,478,077,059.62/12,912,187.40
  6. Step 6: Final answer
    x = 17,908,466.70

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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.