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Finding the Fourth Proportional to 19,659.80, 29,492.40 and 7,176.80

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Solution

The fourth proportional to 19,659.80, 29,492.40 and 7,176.80 is: 10,766.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.80 : 29,492.40 = 7,176.80 : x
  2. Step 2: Convert to fraction form
    19,659.80/29,492.40 = 7,176.80/x
  3. Step 3: Cross multiply
    19,659.80x = 29,492.40 × 7,176.80
  4. Step 4: Simplify right side
    19,659.80x = 211,661,056.32
  5. Step 5: Solve for x
    x = 211,661,056.32/19,659.80
  6. Step 6: Final answer
    x = 10,766.19

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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.