Home / 13,110.30-18,088.65-8,390.70

Finding the Fourth Proportional to 13,110.30, 18,088.65 and 8,390.70

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Solution

The fourth proportional to 13,110.30, 18,088.65 and 8,390.70 is: 11,576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.30 : 18,088.65 = 8,390.70 : x
  2. Step 2: Convert to fraction form
    13,110.30/18,088.65 = 8,390.70/x
  3. Step 3: Cross multiply
    13,110.30x = 18,088.65 × 8,390.70
  4. Step 4: Simplify right side
    13,110.30x = 151,776,435.56
  5. Step 5: Solve for x
    x = 151,776,435.56/13,110.30
  6. Step 6: Final answer
    x = 11,576.89

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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.