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Finding the Fourth Proportional to 12,479.04, 18,708.60 and 7,208.04

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Solution

The fourth proportional to 12,479.04, 18,708.60 and 7,208.04 is: 10,806.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.04 : 18,708.60 = 7,208.04 : x
  2. Step 2: Convert to fraction form
    12,479.04/18,708.60 = 7,208.04/x
  3. Step 3: Cross multiply
    12,479.04x = 18,708.60 × 7,208.04
  4. Step 4: Simplify right side
    12,479.04x = 134,852,337.14
  5. Step 5: Solve for x
    x = 134,852,337.14/12,479.04
  6. Step 6: Final answer
    x = 10,806.31

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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.