Home / 20,903.85-28,845.39-12,404.51

Finding the Fourth Proportional to 20,903.85, 28,845.39 and 12,404.51

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Solution

The fourth proportional to 20,903.85, 28,845.39 and 12,404.51 is: 17,117.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.85 : 28,845.39 = 12,404.51 : x
  2. Step 2: Convert to fraction form
    20,903.85/28,845.39 = 12,404.51/x
  3. Step 3: Cross multiply
    20,903.85x = 28,845.39 × 12,404.51
  4. Step 4: Simplify right side
    20,903.85x = 357,812,784.48
  5. Step 5: Solve for x
    x = 357,812,784.48/20,903.85
  6. Step 6: Final answer
    x = 17,117.08

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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.