Home / 15,518.88-21,396.42-12,683.10

Finding the Fourth Proportional to 15,518.88, 21,396.42 and 12,683.10

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Solution

The fourth proportional to 15,518.88, 21,396.42 and 12,683.10 is: 17,486.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.88 : 21,396.42 = 12,683.10 : x
  2. Step 2: Convert to fraction form
    15,518.88/21,396.42 = 12,683.10/x
  3. Step 3: Cross multiply
    15,518.88x = 21,396.42 × 12,683.10
  4. Step 4: Simplify right side
    15,518.88x = 271,372,934.50
  5. Step 5: Solve for x
    x = 271,372,934.50/15,518.88
  6. Step 6: Final answer
    x = 17,486.63

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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.