Home / 21,811.68-32,702.40-11,955.60

Finding the Fourth Proportional to 21,811.68, 32,702.40 and 11,955.60

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Solution

The fourth proportional to 21,811.68, 32,702.40 and 11,955.60 is: 17,925.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.68 : 32,702.40 = 11,955.60 : x
  2. Step 2: Convert to fraction form
    21,811.68/32,702.40 = 11,955.60/x
  3. Step 3: Cross multiply
    21,811.68x = 32,702.40 × 11,955.60
  4. Step 4: Simplify right side
    21,811.68x = 390,976,813.44
  5. Step 5: Solve for x
    x = 390,976,813.44/21,811.68
  6. Step 6: Final answer
    x = 17,925.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.