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Finding the Fourth Proportional to 13,305,860.60, 19,958,790.90 and 13,128,913.40

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Solution

The fourth proportional to 13,305,860.60, 19,958,790.90 and 13,128,913.40 is: 19,693,370.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305,860.60 : 19,958,790.90 = 13,128,913.40 : x
  2. Step 2: Convert to fraction form
    13,305,860.60/19,958,790.90 = 13,128,913.40/x
  3. Step 3: Cross multiply
    13,305,860.60x = 19,958,790.90 × 13,128,913.40
  4. Step 4: Simplify right side
    13,305,860.60x = 262,037,237,294,808.06
  5. Step 5: Solve for x
    x = 262,037,237,294,808.06/13,305,860.60
  6. Step 6: Final answer
    x = 19,693,370.10

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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.