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Finding the Fourth Proportional to 13,298.40, 19,958.40 and 12,866.40

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Solution

The fourth proportional to 13,298.40, 19,958.40 and 12,866.40 is: 19,310.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,298.40 : 19,958.40 = 12,866.40 : x
  2. Step 2: Convert to fraction form
    13,298.40/19,958.40 = 12,866.40/x
  3. Step 3: Cross multiply
    13,298.40x = 19,958.40 × 12,866.40
  4. Step 4: Simplify right side
    13,298.40x = 256,792,757.76
  5. Step 5: Solve for x
    x = 256,792,757.76/13,298.40
  6. Step 6: Final answer
    x = 19,310.05

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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.