Home / 12,128,412.90-18,150,628.95-11,120,643.30

Finding the Fourth Proportional to 12,128,412.90, 18,150,628.95 and 11,120,643.30

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Solution

The fourth proportional to 12,128,412.90, 18,150,628.95 and 11,120,643.30 is: 16,642,463.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,412.90 : 18,150,628.95 = 11,120,643.30 : x
  2. Step 2: Convert to fraction form
    12,128,412.90/18,150,628.95 = 11,120,643.30/x
  3. Step 3: Cross multiply
    12,128,412.90x = 18,150,628.95 × 11,120,643.30
  4. Step 4: Simplify right side
    12,128,412.90x = 201,846,670,223,603.53
  5. Step 5: Solve for x
    x = 201,846,670,223,603.53/12,128,412.90
  6. Step 6: Final answer
    x = 16,642,463.60

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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.