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Finding the Fourth Proportional to 19,291.40, 28,880.40 and 14,382.80

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Solution

The fourth proportional to 19,291.40, 28,880.40 and 14,382.80 is: 21,531.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,291.40 : 28,880.40 = 14,382.80 : x
  2. Step 2: Convert to fraction form
    19,291.40/28,880.40 = 14,382.80/x
  3. Step 3: Cross multiply
    19,291.40x = 28,880.40 × 14,382.80
  4. Step 4: Simplify right side
    19,291.40x = 415,381,017.12
  5. Step 5: Solve for x
    x = 415,381,017.12/19,291.40
  6. Step 6: Final answer
    x = 21,531.93

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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.