Home / 21,430.35-32,120.69-12,672.63

Finding the Fourth Proportional to 21,430.35, 32,120.69 and 12,672.63

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Solution

The fourth proportional to 21,430.35, 32,120.69 and 12,672.63 is: 18,994.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.35 : 32,120.69 = 12,672.63 : x
  2. Step 2: Convert to fraction form
    21,430.35/32,120.69 = 12,672.63/x
  3. Step 3: Cross multiply
    21,430.35x = 32,120.69 × 12,672.63
  4. Step 4: Simplify right side
    21,430.35x = 407,053,556.35
  5. Step 5: Solve for x
    x = 407,053,556.35/21,430.35
  6. Step 6: Final answer
    x = 18,994.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.