Home / 13,456.85-18,558.63-9,421.61

Finding the Fourth Proportional to 13,456.85, 18,558.63 and 9,421.61

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Solution

The fourth proportional to 13,456.85, 18,558.63 and 9,421.61 is: 12,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.85 : 18,558.63 = 9,421.61 : x
  2. Step 2: Convert to fraction form
    13,456.85/18,558.63 = 9,421.61/x
  3. Step 3: Cross multiply
    13,456.85x = 18,558.63 × 9,421.61
  4. Step 4: Simplify right side
    13,456.85x = 174,852,081.20
  5. Step 5: Solve for x
    x = 174,852,081.20/13,456.85
  6. Step 6: Final answer
    x = 12,993.54

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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.