Home / 20,478.48-30,717.73-5,687.40

Finding the Fourth Proportional to 20,478.48, 30,717.73 and 5,687.40

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Solution

The fourth proportional to 20,478.48, 30,717.73 and 5,687.40 is: 8,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.48 : 30,717.73 = 5,687.40 : x
  2. Step 2: Convert to fraction form
    20,478.48/30,717.73 = 5,687.40/x
  3. Step 3: Cross multiply
    20,478.48x = 30,717.73 × 5,687.40
  4. Step 4: Simplify right side
    20,478.48x = 174,704,017.60
  5. Step 5: Solve for x
    x = 174,704,017.60/20,478.48
  6. Step 6: Final answer
    x = 8,531.10

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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.