Home / 20,430.64-28,191.21-11,476.43

Finding the Fourth Proportional to 20,430.64, 28,191.21 and 11,476.43

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Solution

The fourth proportional to 20,430.64, 28,191.21 and 11,476.43 is: 15,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.64 : 28,191.21 = 11,476.43 : x
  2. Step 2: Convert to fraction form
    20,430.64/28,191.21 = 11,476.43/x
  3. Step 3: Cross multiply
    20,430.64x = 28,191.21 × 11,476.43
  4. Step 4: Simplify right side
    20,430.64x = 323,534,448.18
  5. Step 5: Solve for x
    x = 323,534,448.18/20,430.64
  6. Step 6: Final answer
    x = 15,835.75

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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.