Home / 20,903.09-31,365.36-13,887.92

Finding the Fourth Proportional to 20,903.09, 31,365.36 and 13,887.92

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Solution

The fourth proportional to 20,903.09, 31,365.36 and 13,887.92 is: 20,839.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.09 : 31,365.36 = 13,887.92 : x
  2. Step 2: Convert to fraction form
    20,903.09/31,365.36 = 13,887.92/x
  3. Step 3: Cross multiply
    20,903.09x = 31,365.36 × 13,887.92
  4. Step 4: Simplify right side
    20,903.09x = 435,599,688.86
  5. Step 5: Solve for x
    x = 435,599,688.86/20,903.09
  6. Step 6: Final answer
    x = 20,839.01

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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.