Home / 15,485.84-21,370.56-8,412.56

Finding the Fourth Proportional to 15,485.84, 21,370.56 and 8,412.56

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Solution

The fourth proportional to 15,485.84, 21,370.56 and 8,412.56 is: 11,609.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.84 : 21,370.56 = 8,412.56 : x
  2. Step 2: Convert to fraction form
    15,485.84/21,370.56 = 8,412.56/x
  3. Step 3: Cross multiply
    15,485.84x = 21,370.56 × 8,412.56
  4. Step 4: Simplify right side
    15,485.84x = 179,781,118.23
  5. Step 5: Solve for x
    x = 179,781,118.23/15,485.84
  6. Step 6: Final answer
    x = 11,609.39

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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.