Home / 13,065.40-18,045.11-8,809.15

Finding the Fourth Proportional to 13,065.40, 18,045.11 and 8,809.15

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Solution

The fourth proportional to 13,065.40, 18,045.11 and 8,809.15 is: 12,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,065.40 : 18,045.11 = 8,809.15 : x
  2. Step 2: Convert to fraction form
    13,065.40/18,045.11 = 8,809.15/x
  3. Step 3: Cross multiply
    13,065.40x = 18,045.11 × 8,809.15
  4. Step 4: Simplify right side
    13,065.40x = 158,962,080.76
  5. Step 5: Solve for x
    x = 158,962,080.76/13,065.40
  6. Step 6: Final answer
    x = 12,166.65

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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.