Home / 21,008.84-31,502.12-6,215.60

Finding the Fourth Proportional to 21,008.84, 31,502.12 and 6,215.60

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Solution

The fourth proportional to 21,008.84, 31,502.12 and 6,215.60 is: 9,320.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.84 : 31,502.12 = 6,215.60 : x
  2. Step 2: Convert to fraction form
    21,008.84/31,502.12 = 6,215.60/x
  3. Step 3: Cross multiply
    21,008.84x = 31,502.12 × 6,215.60
  4. Step 4: Simplify right side
    21,008.84x = 195,804,624.75
  5. Step 5: Solve for x
    x = 195,804,624.75/21,008.84
  6. Step 6: Final answer
    x = 9,320.11

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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.