Home / 20,681.10-31,035.54-20,604.99

Finding the Fourth Proportional to 20,681.10, 31,035.54 and 20,604.99

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Solution

The fourth proportional to 20,681.10, 31,035.54 and 20,604.99 is: 30,921.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.10 : 31,035.54 = 20,604.99 : x
  2. Step 2: Convert to fraction form
    20,681.10/31,035.54 = 20,604.99/x
  3. Step 3: Cross multiply
    20,681.10x = 31,035.54 × 20,604.99
  4. Step 4: Simplify right side
    20,681.10x = 639,486,991.34
  5. Step 5: Solve for x
    x = 639,486,991.34/20,681.10
  6. Step 6: Final answer
    x = 30,921.32

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1.5x scale

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.