Home / 21,860.58-30,170.16-12,430.56

Finding the Fourth Proportional to 21,860.58, 30,170.16 and 12,430.56

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Solution

The fourth proportional to 21,860.58, 30,170.16 and 12,430.56 is: 17,155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.58 : 30,170.16 = 12,430.56 : x
  2. Step 2: Convert to fraction form
    21,860.58/30,170.16 = 12,430.56/x
  3. Step 3: Cross multiply
    21,860.58x = 30,170.16 × 12,430.56
  4. Step 4: Simplify right side
    21,860.58x = 375,031,984.09
  5. Step 5: Solve for x
    x = 375,031,984.09/21,860.58
  6. Step 6: Final answer
    x = 17,155.63

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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.