Home / 12,513.12-18,779.36-6,279.36

Finding the Fourth Proportional to 12,513.12, 18,779.36 and 6,279.36

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Solution

The fourth proportional to 12,513.12, 18,779.36 and 6,279.36 is: 9,423.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,513.12 : 18,779.36 = 6,279.36 : x
  2. Step 2: Convert to fraction form
    12,513.12/18,779.36 = 6,279.36/x
  3. Step 3: Cross multiply
    12,513.12x = 18,779.36 × 6,279.36
  4. Step 4: Simplify right side
    12,513.12x = 117,922,362.01
  5. Step 5: Solve for x
    x = 117,922,362.01/12,513.12
  6. Step 6: Final answer
    x = 9,423.90

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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.