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Finding the Fourth Proportional to 11,886,428.40, 17,829,642.60 and 10,185,817.20

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Solution

The fourth proportional to 11,886,428.40, 17,829,642.60 and 10,185,817.20 is: 15,278,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,886,428.40 : 17,829,642.60 = 10,185,817.20 : x
  2. Step 2: Convert to fraction form
    11,886,428.40/17,829,642.60 = 10,185,817.20/x
  3. Step 3: Cross multiply
    11,886,428.40x = 17,829,642.60 × 10,185,817.20
  4. Step 4: Simplify right side
    11,886,428.40x = 181,609,480,264,932.72
  5. Step 5: Solve for x
    x = 181,609,480,264,932.72/11,886,428.40
  6. Step 6: Final answer
    x = 15,278,725.80

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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.