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Finding the Fourth Proportional to 13,368.63, 18,453.57 and 7,779.63

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Solution

The fourth proportional to 13,368.63, 18,453.57 and 7,779.63 is: 10,738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.63 : 18,453.57 = 7,779.63 : x
  2. Step 2: Convert to fraction form
    13,368.63/18,453.57 = 7,779.63/x
  3. Step 3: Cross multiply
    13,368.63x = 18,453.57 × 7,779.63
  4. Step 4: Simplify right side
    13,368.63x = 143,561,946.78
  5. Step 5: Solve for x
    x = 143,561,946.78/13,368.63
  6. Step 6: Final answer
    x = 10,738.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.