Home / 21,417.34-29,555.99-11,985.18

Finding the Fourth Proportional to 21,417.34, 29,555.99 and 11,985.18

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Solution

The fourth proportional to 21,417.34, 29,555.99 and 11,985.18 is: 16,539.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,417.34 : 29,555.99 = 11,985.18 : x
  2. Step 2: Convert to fraction form
    21,417.34/29,555.99 = 11,985.18/x
  3. Step 3: Cross multiply
    21,417.34x = 29,555.99 × 11,985.18
  4. Step 4: Simplify right side
    21,417.34x = 354,233,860.23
  5. Step 5: Solve for x
    x = 354,233,860.23/21,417.34
  6. Step 6: Final answer
    x = 16,539.58

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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.