Home / 21,030.84-29,018.52-12,647.88

Finding the Fourth Proportional to 21,030.84, 29,018.52 and 12,647.88

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Solution

The fourth proportional to 21,030.84, 29,018.52 and 12,647.88 is: 17,451.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.84 : 29,018.52 = 12,647.88 : x
  2. Step 2: Convert to fraction form
    21,030.84/29,018.52 = 12,647.88/x
  3. Step 3: Cross multiply
    21,030.84x = 29,018.52 × 12,647.88
  4. Step 4: Simplify right side
    21,030.84x = 367,022,758.74
  5. Step 5: Solve for x
    x = 367,022,758.74/21,030.84
  6. Step 6: Final answer
    x = 17,451.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.