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Finding the Fourth Proportional to 19,117.40, 28,619.40 and 14,208.80

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Solution

The fourth proportional to 19,117.40, 28,619.40 and 14,208.80 is: 21,271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,117.40 : 28,619.40 = 14,208.80 : x
  2. Step 2: Convert to fraction form
    19,117.40/28,619.40 = 14,208.80/x
  3. Step 3: Cross multiply
    19,117.40x = 28,619.40 × 14,208.80
  4. Step 4: Simplify right side
    19,117.40x = 406,647,330.72
  5. Step 5: Solve for x
    x = 406,647,330.72/19,117.40
  6. Step 6: Final answer
    x = 21,271.06

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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.