Home / 21,275.60-31,914.48-8,126.06

Finding the Fourth Proportional to 21,275.60, 31,914.48 and 8,126.06

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Solution

The fourth proportional to 21,275.60, 31,914.48 and 8,126.06 is: 12,189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.60 : 31,914.48 = 8,126.06 : x
  2. Step 2: Convert to fraction form
    21,275.60/31,914.48 = 8,126.06/x
  3. Step 3: Cross multiply
    21,275.60x = 31,914.48 × 8,126.06
  4. Step 4: Simplify right side
    21,275.60x = 259,338,979.35
  5. Step 5: Solve for x
    x = 259,338,979.35/21,275.60
  6. Step 6: Final answer
    x = 12,189.50

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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.