Home / 13,980.68-19,291.62-8,315.56

Finding the Fourth Proportional to 13,980.68, 19,291.62 and 8,315.56

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Solution

The fourth proportional to 13,980.68, 19,291.62 and 8,315.56 is: 11,474.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.68 : 19,291.62 = 8,315.56 : x
  2. Step 2: Convert to fraction form
    13,980.68/19,291.62 = 8,315.56/x
  3. Step 3: Cross multiply
    13,980.68x = 19,291.62 × 8,315.56
  4. Step 4: Simplify right side
    13,980.68x = 160,420,623.61
  5. Step 5: Solve for x
    x = 160,420,623.61/13,980.68
  6. Step 6: Final answer
    x = 11,474.45

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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.