Home / 21,167.28-31,748.68-8,688.62

Finding the Fourth Proportional to 21,167.28, 31,748.68 and 8,688.62

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Solution

The fourth proportional to 21,167.28, 31,748.68 and 8,688.62 is: 13,032.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.28 : 31,748.68 = 8,688.62 : x
  2. Step 2: Convert to fraction form
    21,167.28/31,748.68 = 8,688.62/x
  3. Step 3: Cross multiply
    21,167.28x = 31,748.68 × 8,688.62
  4. Step 4: Simplify right side
    21,167.28x = 275,852,216.02
  5. Step 5: Solve for x
    x = 275,852,216.02/21,167.28
  6. Step 6: Final answer
    x = 13,032.01

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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.