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Finding the Fourth Proportional to 19,811.31, 29,675.66 and 11,888.70

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Solution

The fourth proportional to 19,811.31, 29,675.66 and 11,888.70 is: 17,808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.31 : 29,675.66 = 11,888.70 : x
  2. Step 2: Convert to fraction form
    19,811.31/29,675.66 = 11,888.70/x
  3. Step 3: Cross multiply
    19,811.31x = 29,675.66 × 11,888.70
  4. Step 4: Simplify right side
    19,811.31x = 352,804,959.60
  5. Step 5: Solve for x
    x = 352,804,959.60/19,811.31
  6. Step 6: Final answer
    x = 17,808.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.