Home / 21,355.96-29,461-13,394.20

Finding the Fourth Proportional to 21,355.96, 29,461 and 13,394.20

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Solution

The fourth proportional to 21,355.96, 29,461 and 13,394.20 is: 18,477.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.96 : 29,461 = 13,394.20 : x
  2. Step 2: Convert to fraction form
    21,355.96/29,461 = 13,394.20/x
  3. Step 3: Cross multiply
    21,355.96x = 29,461 × 13,394.20
  4. Step 4: Simplify right side
    21,355.96x = 394,606,526.20
  5. Step 5: Solve for x
    x = 394,606,526.20/21,355.96
  6. Step 6: Final answer
    x = 18,477.58

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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.