Home / 20,423.56-28,190.34-12,357.19

Finding the Fourth Proportional to 20,423.56, 28,190.34 and 12,357.19

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Solution

The fourth proportional to 20,423.56, 28,190.34 and 12,357.19 is: 17,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.56 : 28,190.34 = 12,357.19 : x
  2. Step 2: Convert to fraction form
    20,423.56/28,190.34 = 12,357.19/x
  3. Step 3: Cross multiply
    20,423.56x = 28,190.34 × 12,357.19
  4. Step 4: Simplify right side
    20,423.56x = 348,353,387.54
  5. Step 5: Solve for x
    x = 348,353,387.54/20,423.56
  6. Step 6: Final answer
    x = 17,056.45

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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.