Home / 21,000.39-31,511.52-9,310.89

Finding the Fourth Proportional to 21,000.39, 31,511.52 and 9,310.89

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Solution

The fourth proportional to 21,000.39, 31,511.52 and 9,310.89 is: 13,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.39 : 31,511.52 = 9,310.89 : x
  2. Step 2: Convert to fraction form
    21,000.39/31,511.52 = 9,310.89/x
  3. Step 3: Cross multiply
    21,000.39x = 31,511.52 × 9,310.89
  4. Step 4: Simplify right side
    21,000.39x = 293,400,296.45
  5. Step 5: Solve for x
    x = 293,400,296.45/21,000.39
  6. Step 6: Final answer
    x = 13,971.18

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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.