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Finding the Fourth Proportional to 12,964.70, 19,432.65 and 6,722.30

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Solution

The fourth proportional to 12,964.70, 19,432.65 and 6,722.30 is: 10,075.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,964.70 : 19,432.65 = 6,722.30 : x
  2. Step 2: Convert to fraction form
    12,964.70/19,432.65 = 6,722.30/x
  3. Step 3: Cross multiply
    12,964.70x = 19,432.65 × 6,722.30
  4. Step 4: Simplify right side
    12,964.70x = 130,632,103.10
  5. Step 5: Solve for x
    x = 130,632,103.10/12,964.70
  6. Step 6: Final answer
    x = 10,075.98

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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.