Home / 8,779.90-13,169.40-6,319.12

Finding the Fourth Proportional to 8,779.90, 13,169.40 and 6,319.12

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Solution

The fourth proportional to 8,779.90, 13,169.40 and 6,319.12 is: 9,478.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.90 : 13,169.40 = 6,319.12 : x
  2. Step 2: Convert to fraction form
    8,779.90/13,169.40 = 6,319.12/x
  3. Step 3: Cross multiply
    8,779.90x = 13,169.40 × 6,319.12
  4. Step 4: Simplify right side
    8,779.90x = 83,219,018.93
  5. Step 5: Solve for x
    x = 83,219,018.93/8,779.90
  6. Step 6: Final answer
    x = 9,478.36

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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.