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Finding the Fourth Proportional to 12,695.80, 19,005.30 and 11,313.40

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Solution

The fourth proportional to 12,695.80, 19,005.30 and 11,313.40 is: 16,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.80 : 19,005.30 = 11,313.40 : x
  2. Step 2: Convert to fraction form
    12,695.80/19,005.30 = 11,313.40/x
  3. Step 3: Cross multiply
    12,695.80x = 19,005.30 × 11,313.40
  4. Step 4: Simplify right side
    12,695.80x = 215,014,561.02
  5. Step 5: Solve for x
    x = 215,014,561.02/12,695.80
  6. Step 6: Final answer
    x = 16,935.88

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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.