Home / 20,423.57-30,612.39-10,400.19

Finding the Fourth Proportional to 20,423.57, 30,612.39 and 10,400.19

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Solution

The fourth proportional to 20,423.57, 30,612.39 and 10,400.19 is: 15,588.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.57 : 30,612.39 = 10,400.19 : x
  2. Step 2: Convert to fraction form
    20,423.57/30,612.39 = 10,400.19/x
  3. Step 3: Cross multiply
    20,423.57x = 30,612.39 × 10,400.19
  4. Step 4: Simplify right side
    20,423.57x = 318,374,672.35
  5. Step 5: Solve for x
    x = 318,374,672.35/20,423.57
  6. Step 6: Final answer
    x = 15,588.59

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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.