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Finding the Fourth Proportional to 12,950.60, 19,445.70 and 7,118.60

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Solution

The fourth proportional to 12,950.60, 19,445.70 and 7,118.60 is: 10,688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,950.60 : 19,445.70 = 7,118.60 : x
  2. Step 2: Convert to fraction form
    12,950.60/19,445.70 = 7,118.60/x
  3. Step 3: Cross multiply
    12,950.60x = 19,445.70 × 7,118.60
  4. Step 4: Simplify right side
    12,950.60x = 138,426,160.02
  5. Step 5: Solve for x
    x = 138,426,160.02/12,950.60
  6. Step 6: Final answer
    x = 10,688.78

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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.