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Finding the Fourth Proportional to 13,608,878.40, 20,392,322.40 and 11,803,291.20

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Solution

The fourth proportional to 13,608,878.40, 20,392,322.40 and 11,803,291.20 is: 17,686,727.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,878.40 : 20,392,322.40 = 11,803,291.20 : x
  2. Step 2: Convert to fraction form
    13,608,878.40/20,392,322.40 = 11,803,291.20/x
  3. Step 3: Cross multiply
    13,608,878.40x = 20,392,322.40 × 11,803,291.20
  4. Step 4: Simplify right side
    13,608,878.40x = 240,696,519,531,482.84
  5. Step 5: Solve for x
    x = 240,696,519,531,482.84/13,608,878.40
  6. Step 6: Final answer
    x = 17,686,727.18

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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.