Home / 20,299.79-28,018.23-12,340.33

Finding the Fourth Proportional to 20,299.79, 28,018.23 and 12,340.33

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Solution

The fourth proportional to 20,299.79, 28,018.23 and 12,340.33 is: 17,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.79 : 28,018.23 = 12,340.33 : x
  2. Step 2: Convert to fraction form
    20,299.79/28,018.23 = 12,340.33/x
  3. Step 3: Cross multiply
    20,299.79x = 28,018.23 × 12,340.33
  4. Step 4: Simplify right side
    20,299.79x = 345,754,204.22
  5. Step 5: Solve for x
    x = 345,754,204.22/20,299.79
  6. Step 6: Final answer
    x = 17,032.40

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1.5x scale

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.