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Finding the Fourth Proportional to 19,377.68, 26,740.68 and 11,420.40

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Solution

The fourth proportional to 19,377.68, 26,740.68 and 11,420.40 is: 15,759.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,377.68 : 26,740.68 = 11,420.40 : x
  2. Step 2: Convert to fraction form
    19,377.68/26,740.68 = 11,420.40/x
  3. Step 3: Cross multiply
    19,377.68x = 26,740.68 × 11,420.40
  4. Step 4: Simplify right side
    19,377.68x = 305,389,261.87
  5. Step 5: Solve for x
    x = 305,389,261.87/19,377.68
  6. Step 6: Final answer
    x = 15,759.85

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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.