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Finding the Fourth Proportional to 18,515.40, 25,973.40 and 18,515.40

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Solution

The fourth proportional to 18,515.40, 25,973.40 and 18,515.40 is: 25,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.40 : 25,973.40 = 18,515.40 : x
  2. Step 2: Convert to fraction form
    18,515.40/25,973.40 = 18,515.40/x
  3. Step 3: Cross multiply
    18,515.40x = 25,973.40 × 18,515.40
  4. Step 4: Simplify right side
    18,515.40x = 480,907,890.36
  5. Step 5: Solve for x
    x = 480,907,890.36/18,515.40
  6. Step 6: Final answer
    x = 25,973.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.