Home / 21,985.40-30,339.80-11,914.12

Finding the Fourth Proportional to 21,985.40, 30,339.80 and 11,914.12

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Solution

The fourth proportional to 21,985.40, 30,339.80 and 11,914.12 is: 16,441.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.40 : 30,339.80 = 11,914.12 : x
  2. Step 2: Convert to fraction form
    21,985.40/30,339.80 = 11,914.12/x
  3. Step 3: Cross multiply
    21,985.40x = 30,339.80 × 11,914.12
  4. Step 4: Simplify right side
    21,985.40x = 361,472,017.98
  5. Step 5: Solve for x
    x = 361,472,017.98/21,985.40
  6. Step 6: Final answer
    x = 16,441.46

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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.