Home / 13,156.90-18,162.84-7,780.26

Finding the Fourth Proportional to 13,156.90, 18,162.84 and 7,780.26

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Solution

The fourth proportional to 13,156.90, 18,162.84 and 7,780.26 is: 10,740.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.90 : 18,162.84 = 7,780.26 : x
  2. Step 2: Convert to fraction form
    13,156.90/18,162.84 = 7,780.26/x
  3. Step 3: Cross multiply
    13,156.90x = 18,162.84 × 7,780.26
  4. Step 4: Simplify right side
    13,156.90x = 141,311,617.54
  5. Step 5: Solve for x
    x = 141,311,617.54/13,156.90
  6. Step 6: Final answer
    x = 10,740.49

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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.