Home / 21,010.76-31,519.89-6,971.63

Finding the Fourth Proportional to 21,010.76, 31,519.89 and 6,971.63

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Solution

The fourth proportional to 21,010.76, 31,519.89 and 6,971.63 is: 10,458.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.76 : 31,519.89 = 6,971.63 : x
  2. Step 2: Convert to fraction form
    21,010.76/31,519.89 = 6,971.63/x
  3. Step 3: Cross multiply
    21,010.76x = 31,519.89 × 6,971.63
  4. Step 4: Simplify right side
    21,010.76x = 219,744,818.26
  5. Step 5: Solve for x
    x = 219,744,818.26/21,010.76
  6. Step 6: Final answer
    x = 10,458.68

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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.