Home / 15,419.07-21,278.16-8,704.55

Finding the Fourth Proportional to 15,419.07, 21,278.16 and 8,704.55

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Solution

The fourth proportional to 15,419.07, 21,278.16 and 8,704.55 is: 12,012.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.07 : 21,278.16 = 8,704.55 : x
  2. Step 2: Convert to fraction form
    15,419.07/21,278.16 = 8,704.55/x
  3. Step 3: Cross multiply
    15,419.07x = 21,278.16 × 8,704.55
  4. Step 4: Simplify right side
    15,419.07x = 185,216,860.82
  5. Step 5: Solve for x
    x = 185,216,860.82/15,419.07
  6. Step 6: Final answer
    x = 12,012.19

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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.