Home / 19,378.43-26,748.98-11,420.15

Finding the Fourth Proportional to 19,378.43, 26,748.98 and 11,420.15

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Solution

The fourth proportional to 19,378.43, 26,748.98 and 11,420.15 is: 15,763.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,378.43 : 26,748.98 = 11,420.15 : x
  2. Step 2: Convert to fraction form
    19,378.43/26,748.98 = 11,420.15/x
  3. Step 3: Cross multiply
    19,378.43x = 26,748.98 × 11,420.15
  4. Step 4: Simplify right side
    19,378.43x = 305,477,173.10
  5. Step 5: Solve for x
    x = 305,477,173.10/19,378.43
  6. Step 6: Final answer
    x = 15,763.78

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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.