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Finding the Fourth Proportional to 12,679.60, 19,030.20 and 5,670.40

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Solution

The fourth proportional to 12,679.60, 19,030.20 and 5,670.40 is: 8,510.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.60 : 19,030.20 = 5,670.40 : x
  2. Step 2: Convert to fraction form
    12,679.60/19,030.20 = 5,670.40/x
  3. Step 3: Cross multiply
    12,679.60x = 19,030.20 × 5,670.40
  4. Step 4: Simplify right side
    12,679.60x = 107,908,846.08
  5. Step 5: Solve for x
    x = 107,908,846.08/12,679.60
  6. Step 6: Final answer
    x = 8,510.43

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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.