Home / 15,291.87-21,074.21-11,929.35

Finding the Fourth Proportional to 15,291.87, 21,074.21 and 11,929.35

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Solution

The fourth proportional to 15,291.87, 21,074.21 and 11,929.35 is: 16,440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.87 : 21,074.21 = 11,929.35 : x
  2. Step 2: Convert to fraction form
    15,291.87/21,074.21 = 11,929.35/x
  3. Step 3: Cross multiply
    15,291.87x = 21,074.21 × 11,929.35
  4. Step 4: Simplify right side
    15,291.87x = 251,401,567.42
  5. Step 5: Solve for x
    x = 251,401,567.42/15,291.87
  6. Step 6: Final answer
    x = 16,440.21

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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.