Home / 25,430.96-35,066.04-20,817.20

Finding the Fourth Proportional to 25,430.96, 35,066.04 and 20,817.20

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Solution

The fourth proportional to 25,430.96, 35,066.04 and 20,817.20 is: 28,704.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,430.96 : 35,066.04 = 20,817.20 : x
  2. Step 2: Convert to fraction form
    25,430.96/35,066.04 = 20,817.20/x
  3. Step 3: Cross multiply
    25,430.96x = 35,066.04 × 20,817.20
  4. Step 4: Simplify right side
    25,430.96x = 729,976,767.89
  5. Step 5: Solve for x
    x = 729,976,767.89/25,430.96
  6. Step 6: Final answer
    x = 28,704.26

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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.