Home / 13,122,018.70-19,683,028.05-12,643,721.80

Finding the Fourth Proportional to 13,122,018.70, 19,683,028.05 and 12,643,721.80

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Solution

The fourth proportional to 13,122,018.70, 19,683,028.05 and 12,643,721.80 is: 18,965,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122,018.70 : 19,683,028.05 = 12,643,721.80 : x
  2. Step 2: Convert to fraction form
    13,122,018.70/19,683,028.05 = 12,643,721.80/x
  3. Step 3: Cross multiply
    13,122,018.70x = 19,683,028.05 × 12,643,721.80
  4. Step 4: Simplify right side
    13,122,018.70x = 248,866,730,845,796.50
  5. Step 5: Solve for x
    x = 248,866,730,845,796.50/13,122,018.70
  6. Step 6: Final answer
    x = 18,965,582.70

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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.