Home / 20,909.40-31,327.56-17,421.81

Finding the Fourth Proportional to 20,909.40, 31,327.56 and 17,421.81

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Solution

The fourth proportional to 20,909.40, 31,327.56 and 17,421.81 is: 26,102.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.40 : 31,327.56 = 17,421.81 : x
  2. Step 2: Convert to fraction form
    20,909.40/31,327.56 = 17,421.81/x
  3. Step 3: Cross multiply
    20,909.40x = 31,327.56 × 17,421.81
  4. Step 4: Simplify right side
    20,909.40x = 545,782,798.08
  5. Step 5: Solve for x
    x = 545,782,798.08/20,909.40
  6. Step 6: Final answer
    x = 26,102.27

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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.