Home / 13,263.42-18,309.78-8,420.58

Finding the Fourth Proportional to 13,263.42, 18,309.78 and 8,420.58

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Solution

The fourth proportional to 13,263.42, 18,309.78 and 8,420.58 is: 11,624.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,263.42 : 18,309.78 = 8,420.58 : x
  2. Step 2: Convert to fraction form
    13,263.42/18,309.78 = 8,420.58/x
  3. Step 3: Cross multiply
    13,263.42x = 18,309.78 × 8,420.58
  4. Step 4: Simplify right side
    13,263.42x = 154,178,967.27
  5. Step 5: Solve for x
    x = 154,178,967.27/13,263.42
  6. Step 6: Final answer
    x = 11,624.37

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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.