Home / 15,486.42-21,370.19-8,412.69

Finding the Fourth Proportional to 15,486.42, 21,370.19 and 8,412.69

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Solution

The fourth proportional to 15,486.42, 21,370.19 and 8,412.69 is: 11,608.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.42 : 21,370.19 = 8,412.69 : x
  2. Step 2: Convert to fraction form
    15,486.42/21,370.19 = 8,412.69/x
  3. Step 3: Cross multiply
    15,486.42x = 21,370.19 × 8,412.69
  4. Step 4: Simplify right side
    15,486.42x = 179,780,783.71
  5. Step 5: Solve for x
    x = 179,780,783.71/15,486.42
  6. Step 6: Final answer
    x = 11,608.93

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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.