Home / 21,290.05-29,381.18-11,858.62

Finding the Fourth Proportional to 21,290.05, 29,381.18 and 11,858.62

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Solution

The fourth proportional to 21,290.05, 29,381.18 and 11,858.62 is: 16,365.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.05 : 29,381.18 = 11,858.62 : x
  2. Step 2: Convert to fraction form
    21,290.05/29,381.18 = 11,858.62/x
  3. Step 3: Cross multiply
    21,290.05x = 29,381.18 × 11,858.62
  4. Step 4: Simplify right side
    21,290.05x = 348,420,248.77
  5. Step 5: Solve for x
    x = 348,420,248.77/21,290.05
  6. Step 6: Final answer
    x = 16,365.40

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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.