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Finding the Fourth Proportional to 12,762.40, 19,165.20 and 9,479.20

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Solution

The fourth proportional to 12,762.40, 19,165.20 and 9,479.20 is: 14,234.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.40 : 19,165.20 = 9,479.20 : x
  2. Step 2: Convert to fraction form
    12,762.40/19,165.20 = 9,479.20/x
  3. Step 3: Cross multiply
    12,762.40x = 19,165.20 × 9,479.20
  4. Step 4: Simplify right side
    12,762.40x = 181,670,763.84
  5. Step 5: Solve for x
    x = 181,670,763.84/12,762.40
  6. Step 6: Final answer
    x = 14,234.84

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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.