Home / 21,071.06-31,606.58-6,279.60

Finding the Fourth Proportional to 21,071.06, 31,606.58 and 6,279.60

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Solution

The fourth proportional to 21,071.06, 31,606.58 and 6,279.60 is: 9,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.06 : 31,606.58 = 6,279.60 : x
  2. Step 2: Convert to fraction form
    21,071.06/31,606.58 = 6,279.60/x
  3. Step 3: Cross multiply
    21,071.06x = 31,606.58 × 6,279.60
  4. Step 4: Simplify right side
    21,071.06x = 198,476,679.77
  5. Step 5: Solve for x
    x = 198,476,679.77/21,071.06
  6. Step 6: Final answer
    x = 9,419.40

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1.5x scale

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.