Home / 21,010.63-31,519.70-6,971.50

Finding the Fourth Proportional to 21,010.63, 31,519.70 and 6,971.50

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Solution

The fourth proportional to 21,010.63, 31,519.70 and 6,971.50 is: 10,458.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.63 : 31,519.70 = 6,971.50 : x
  2. Step 2: Convert to fraction form
    21,010.63/31,519.70 = 6,971.50/x
  3. Step 3: Cross multiply
    21,010.63x = 31,519.70 × 6,971.50
  4. Step 4: Simplify right side
    21,010.63x = 219,739,593.09
  5. Step 5: Solve for x
    x = 219,739,593.09/21,010.63
  6. Step 6: Final answer
    x = 10,458.50

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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.