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Finding the Fourth Proportional to 12,646.76, 18,978.76 and 4,438.76

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Solution

The fourth proportional to 12,646.76, 18,978.76 and 4,438.76 is: 6,661.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,646.76 : 18,978.76 = 4,438.76 : x
  2. Step 2: Convert to fraction form
    12,646.76/18,978.76 = 4,438.76/x
  3. Step 3: Cross multiply
    12,646.76x = 18,978.76 × 4,438.76
  4. Step 4: Simplify right side
    12,646.76x = 84,242,160.74
  5. Step 5: Solve for x
    x = 84,242,160.74/12,646.76
  6. Step 6: Final answer
    x = 6,661.17

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1.5x scale

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.