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Finding the Fourth Proportional to 14,947,978.64, 20,628,210.60 and 8,072,460.64

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Solution

The fourth proportional to 14,947,978.64, 20,628,210.60 and 8,072,460.64 is: 11,139,995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,947,978.64 : 20,628,210.60 = 8,072,460.64 : x
  2. Step 2: Convert to fraction form
    14,947,978.64/20,628,210.60 = 8,072,460.64/x
  3. Step 3: Cross multiply
    14,947,978.64x = 20,628,210.60 × 8,072,460.64
  4. Step 4: Simplify right side
    14,947,978.64x = 166,520,418,142,130.78
  5. Step 5: Solve for x
    x = 166,520,418,142,130.78/14,947,978.64
  6. Step 6: Final answer
    x = 11,139,995.72

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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.