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Finding the Fourth Proportional to 13,671,806.40, 20,507,709.60 and 11,448,907.20

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Solution

The fourth proportional to 13,671,806.40, 20,507,709.60 and 11,448,907.20 is: 17,173,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671,806.40 : 20,507,709.60 = 11,448,907.20 : x
  2. Step 2: Convert to fraction form
    13,671,806.40/20,507,709.60 = 11,448,907.20/x
  3. Step 3: Cross multiply
    13,671,806.40x = 20,507,709.60 × 11,448,907.20
  4. Step 4: Simplify right side
    13,671,806.40x = 234,790,864,094,949.12
  5. Step 5: Solve for x
    x = 234,790,864,094,949.12/13,671,806.40
  6. Step 6: Final answer
    x = 17,173,360.80

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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.