Home / 21,417.40-29,558.10-11,987.56

Finding the Fourth Proportional to 21,417.40, 29,558.10 and 11,987.56

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Solution

The fourth proportional to 21,417.40, 29,558.10 and 11,987.56 is: 16,544.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,417.40 : 29,558.10 = 11,987.56 : x
  2. Step 2: Convert to fraction form
    21,417.40/29,558.10 = 11,987.56/x
  3. Step 3: Cross multiply
    21,417.40x = 29,558.10 × 11,987.56
  4. Step 4: Simplify right side
    21,417.40x = 354,329,497.24
  5. Step 5: Solve for x
    x = 354,329,497.24/21,417.40
  6. Step 6: Final answer
    x = 16,544.00

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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.