Home / 21,178.17-31,765.02-8,699.51

Finding the Fourth Proportional to 21,178.17, 31,765.02 and 8,699.51

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Solution

The fourth proportional to 21,178.17, 31,765.02 and 8,699.51 is: 13,048.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.17 : 31,765.02 = 8,699.51 : x
  2. Step 2: Convert to fraction form
    21,178.17/31,765.02 = 8,699.51/x
  3. Step 3: Cross multiply
    21,178.17x = 31,765.02 × 8,699.51
  4. Step 4: Simplify right side
    21,178.17x = 276,340,109.14
  5. Step 5: Solve for x
    x = 276,340,109.14/21,178.17
  6. Step 6: Final answer
    x = 13,048.35

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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.