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Finding the Fourth Proportional to 8,779.36, 13,091.60 and 8,700.34

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Solution

The fourth proportional to 8,779.36, 13,091.60 and 8,700.34 is: 12,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.36 : 13,091.60 = 8,700.34 : x
  2. Step 2: Convert to fraction form
    8,779.36/13,091.60 = 8,700.34/x
  3. Step 3: Cross multiply
    8,779.36x = 13,091.60 × 8,700.34
  4. Step 4: Simplify right side
    8,779.36x = 113,901,371.14
  5. Step 5: Solve for x
    x = 113,901,371.14/8,779.36
  6. Step 6: Final answer
    x = 12,973.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.