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Finding the Fourth Proportional to 12,865.40, 18,063.40 and 12,865.40

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Solution

The fourth proportional to 12,865.40, 18,063.40 and 12,865.40 is: 18,063.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.40 : 18,063.40 = 12,865.40 : x
  2. Step 2: Convert to fraction form
    12,865.40/18,063.40 = 12,865.40/x
  3. Step 3: Cross multiply
    12,865.40x = 18,063.40 × 12,865.40
  4. Step 4: Simplify right side
    12,865.40x = 232,392,866.36
  5. Step 5: Solve for x
    x = 232,392,866.36/12,865.40
  6. Step 6: Final answer
    x = 18,063.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.