Home / 13,421.88-18,511.93-9,118.30

Finding the Fourth Proportional to 13,421.88, 18,511.93 and 9,118.30

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Solution

The fourth proportional to 13,421.88, 18,511.93 and 9,118.30 is: 12,576.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.88 : 18,511.93 = 9,118.30 : x
  2. Step 2: Convert to fraction form
    13,421.88/18,511.93 = 9,118.30/x
  3. Step 3: Cross multiply
    13,421.88x = 18,511.93 × 9,118.30
  4. Step 4: Simplify right side
    13,421.88x = 168,797,331.32
  5. Step 5: Solve for x
    x = 168,797,331.32/13,421.88
  6. Step 6: Final answer
    x = 12,576.28

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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.