Home / 21,412.70-32,128.28-8,935.18

Finding the Fourth Proportional to 21,412.70, 32,128.28 and 8,935.18

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Solution

The fourth proportional to 21,412.70, 32,128.28 and 8,935.18 is: 13,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.70 : 32,128.28 = 8,935.18 : x
  2. Step 2: Convert to fraction form
    21,412.70/32,128.28 = 8,935.18/x
  3. Step 3: Cross multiply
    21,412.70x = 32,128.28 × 8,935.18
  4. Step 4: Simplify right side
    21,412.70x = 287,071,964.89
  5. Step 5: Solve for x
    x = 287,071,964.89/21,412.70
  6. Step 6: Final answer
    x = 13,406.62

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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.