Home / 21,137.80-31,663.64-10,010.76

Finding the Fourth Proportional to 21,137.80, 31,663.64 and 10,010.76

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Solution

The fourth proportional to 21,137.80, 31,663.64 and 10,010.76 is: 14,995.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.80 : 31,663.64 = 10,010.76 : x
  2. Step 2: Convert to fraction form
    21,137.80/31,663.64 = 10,010.76/x
  3. Step 3: Cross multiply
    21,137.80x = 31,663.64 × 10,010.76
  4. Step 4: Simplify right side
    21,137.80x = 316,977,100.77
  5. Step 5: Solve for x
    x = 316,977,100.77/21,137.80
  6. Step 6: Final answer
    x = 14,995.75

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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.