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Finding the Fourth Proportional to 19,876.51, 27,430.41 and 11,377.99

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Solution

The fourth proportional to 19,876.51, 27,430.41 and 11,377.99 is: 15,702.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,876.51 : 27,430.41 = 11,377.99 : x
  2. Step 2: Convert to fraction form
    19,876.51/27,430.41 = 11,377.99/x
  3. Step 3: Cross multiply
    19,876.51x = 27,430.41 × 11,377.99
  4. Step 4: Simplify right side
    19,876.51x = 312,102,930.68
  5. Step 5: Solve for x
    x = 312,102,930.68/19,876.51
  6. Step 6: Final answer
    x = 15,702.10

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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.