Home / 20,518.15-28,362.87-18,301.99

Finding the Fourth Proportional to 20,518.15, 28,362.87 and 18,301.99

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Solution

The fourth proportional to 20,518.15, 28,362.87 and 18,301.99 is: 25,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.15 : 28,362.87 = 18,301.99 : x
  2. Step 2: Convert to fraction form
    20,518.15/28,362.87 = 18,301.99/x
  3. Step 3: Cross multiply
    20,518.15x = 28,362.87 × 18,301.99
  4. Step 4: Simplify right side
    20,518.15x = 519,096,963.11
  5. Step 5: Solve for x
    x = 519,096,963.11/20,518.15
  6. Step 6: Final answer
    x = 25,299.40

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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.