Home / 12,279.81-16,931.26-9,555.14

Finding the Fourth Proportional to 12,279.81, 16,931.26 and 9,555.14

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Solution

The fourth proportional to 12,279.81, 16,931.26 and 9,555.14 is: 13,174.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.81 : 16,931.26 = 9,555.14 : x
  2. Step 2: Convert to fraction form
    12,279.81/16,931.26 = 9,555.14/x
  3. Step 3: Cross multiply
    12,279.81x = 16,931.26 × 9,555.14
  4. Step 4: Simplify right side
    12,279.81x = 161,780,559.68
  5. Step 5: Solve for x
    x = 161,780,559.68/12,279.81
  6. Step 6: Final answer
    x = 13,174.52

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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.