Home / 20,727.60-28,615.32-15,908.40

Finding the Fourth Proportional to 20,727.60, 28,615.32 and 15,908.40

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Solution

The fourth proportional to 20,727.60, 28,615.32 and 15,908.40 is: 21,962.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.60 : 28,615.32 = 15,908.40 : x
  2. Step 2: Convert to fraction form
    20,727.60/28,615.32 = 15,908.40/x
  3. Step 3: Cross multiply
    20,727.60x = 28,615.32 × 15,908.40
  4. Step 4: Simplify right side
    20,727.60x = 455,223,956.69
  5. Step 5: Solve for x
    x = 455,223,956.69/20,727.60
  6. Step 6: Final answer
    x = 21,962.21

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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.