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Finding the Fourth Proportional to 13,128,951.68, 18,117,978.39 and 7,248,597.24

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Solution

The fourth proportional to 13,128,951.68, 18,117,978.39 and 7,248,597.24 is: 10,003,078.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128,951.68 : 18,117,978.39 = 7,248,597.24 : x
  2. Step 2: Convert to fraction form
    13,128,951.68/18,117,978.39 = 7,248,597.24/x
  3. Step 3: Cross multiply
    13,128,951.68x = 18,117,978.39 × 7,248,597.24
  4. Step 4: Simplify right side
    13,128,951.68x = 131,329,928,115,890.67
  5. Step 5: Solve for x
    x = 131,329,928,115,890.67/13,128,951.68
  6. Step 6: Final answer
    x = 10,003,078.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.