Home / 21,360.05-29,515.93-18,518.30

Finding the Fourth Proportional to 21,360.05, 29,515.93 and 18,518.30

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Solution

The fourth proportional to 21,360.05, 29,515.93 and 18,518.30 is: 25,589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.05 : 29,515.93 = 18,518.30 : x
  2. Step 2: Convert to fraction form
    21,360.05/29,515.93 = 18,518.30/x
  3. Step 3: Cross multiply
    21,360.05x = 29,515.93 × 18,518.30
  4. Step 4: Simplify right side
    21,360.05x = 546,584,698.94
  5. Step 5: Solve for x
    x = 546,584,698.94/21,360.05
  6. Step 6: Final answer
    x = 25,589.12

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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.