Home / 12,912,015.40-19,368,023.10-11,938,805.80

Finding the Fourth Proportional to 12,912,015.40, 19,368,023.10 and 11,938,805.80

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Solution

The fourth proportional to 12,912,015.40, 19,368,023.10 and 11,938,805.80 is: 17,908,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912,015.40 : 19,368,023.10 = 11,938,805.80 : x
  2. Step 2: Convert to fraction form
    12,912,015.40/19,368,023.10 = 11,938,805.80/x
  3. Step 3: Cross multiply
    12,912,015.40x = 19,368,023.10 × 11,938,805.80
  4. Step 4: Simplify right side
    12,912,015.40x = 231,231,066,520,814
  5. Step 5: Solve for x
    x = 231,231,066,520,814/12,912,015.40
  6. Step 6: Final answer
    x = 17,908,208.70

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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.