Home / 21,338.16-29,439.63-13,788.94

Finding the Fourth Proportional to 21,338.16, 29,439.63 and 13,788.94

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Solution

The fourth proportional to 21,338.16, 29,439.63 and 13,788.94 is: 19,024.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.16 : 29,439.63 = 13,788.94 : x
  2. Step 2: Convert to fraction form
    21,338.16/29,439.63 = 13,788.94/x
  3. Step 3: Cross multiply
    21,338.16x = 29,439.63 × 13,788.94
  4. Step 4: Simplify right side
    21,338.16x = 405,941,291.69
  5. Step 5: Solve for x
    x = 405,941,291.69/21,338.16
  6. Step 6: Final answer
    x = 19,024.19

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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.