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Finding the Fourth Proportional to 19,258.40, 28,880.40 and 13,397.60

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Solution

The fourth proportional to 19,258.40, 28,880.40 and 13,397.60 is: 20,091.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,258.40 : 28,880.40 = 13,397.60 : x
  2. Step 2: Convert to fraction form
    19,258.40/28,880.40 = 13,397.60/x
  3. Step 3: Cross multiply
    19,258.40x = 28,880.40 × 13,397.60
  4. Step 4: Simplify right side
    19,258.40x = 386,928,047.04
  5. Step 5: Solve for x
    x = 386,928,047.04/19,258.40
  6. Step 6: Final answer
    x = 20,091.39

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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.