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Finding the Fourth Proportional to 15,043,978.36, 20,760,108.02 and 8,168,303.08

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Solution

The fourth proportional to 15,043,978.36, 20,760,108.02 and 8,168,303.08 is: 11,271,942.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,043,978.36 : 20,760,108.02 = 8,168,303.08 : x
  2. Step 2: Convert to fraction form
    15,043,978.36/20,760,108.02 = 8,168,303.08/x
  3. Step 3: Cross multiply
    15,043,978.36x = 20,760,108.02 × 8,168,303.08
  4. Step 4: Simplify right side
    15,043,978.36x = 169,574,854,280,898.69
  5. Step 5: Solve for x
    x = 169,574,854,280,898.69/15,043,978.36
  6. Step 6: Final answer
    x = 11,271,942.18

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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.