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Finding the Fourth Proportional to 13,312.80, 18,676.80 and 13,312.80

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Solution

The fourth proportional to 13,312.80, 18,676.80 and 13,312.80 is: 18,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312.80 : 18,676.80 = 13,312.80 : x
  2. Step 2: Convert to fraction form
    13,312.80/18,676.80 = 13,312.80/x
  3. Step 3: Cross multiply
    13,312.80x = 18,676.80 × 13,312.80
  4. Step 4: Simplify right side
    13,312.80x = 248,640,503.04
  5. Step 5: Solve for x
    x = 248,640,503.04/13,312.80
  6. Step 6: Final answer
    x = 18,676.80

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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.