Home / 13,609.08-18,779.25-7,639.59

Finding the Fourth Proportional to 13,609.08, 18,779.25 and 7,639.59

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Solution

The fourth proportional to 13,609.08, 18,779.25 and 7,639.59 is: 10,541.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.08 : 18,779.25 = 7,639.59 : x
  2. Step 2: Convert to fraction form
    13,609.08/18,779.25 = 7,639.59/x
  3. Step 3: Cross multiply
    13,609.08x = 18,779.25 × 7,639.59
  4. Step 4: Simplify right side
    13,609.08x = 143,465,770.51
  5. Step 5: Solve for x
    x = 143,465,770.51/13,609.08
  6. Step 6: Final answer
    x = 10,541.92

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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.