Home / 21,317.31-29,417.42-12,365.65

Finding the Fourth Proportional to 21,317.31, 29,417.42 and 12,365.65

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Solution

The fourth proportional to 21,317.31, 29,417.42 and 12,365.65 is: 17,064.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.31 : 29,417.42 = 12,365.65 : x
  2. Step 2: Convert to fraction form
    21,317.31/29,417.42 = 12,365.65/x
  3. Step 3: Cross multiply
    21,317.31x = 29,417.42 × 12,365.65
  4. Step 4: Simplify right side
    21,317.31x = 363,765,476.99
  5. Step 5: Solve for x
    x = 363,765,476.99/21,317.31
  6. Step 6: Final answer
    x = 17,064.32

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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.