Home / 21,417.09-29,554.92-11,985.72

Finding the Fourth Proportional to 21,417.09, 29,554.92 and 11,985.72

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Solution

The fourth proportional to 21,417.09, 29,554.92 and 11,985.72 is: 16,539.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,417.09 : 29,554.92 = 11,985.72 : x
  2. Step 2: Convert to fraction form
    21,417.09/29,554.92 = 11,985.72/x
  3. Step 3: Cross multiply
    21,417.09x = 29,554.92 × 11,985.72
  4. Step 4: Simplify right side
    21,417.09x = 354,236,995.74
  5. Step 5: Solve for x
    x = 354,236,995.74/21,417.09
  6. Step 6: Final answer
    x = 16,539.92

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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.