Home / 15,504.57-21,396.15-8,430.84

Finding the Fourth Proportional to 15,504.57, 21,396.15 and 8,430.84

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Solution

The fourth proportional to 15,504.57, 21,396.15 and 8,430.84 is: 11,634.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.57 : 21,396.15 = 8,430.84 : x
  2. Step 2: Convert to fraction form
    15,504.57/21,396.15 = 8,430.84/x
  3. Step 3: Cross multiply
    15,504.57x = 21,396.15 × 8,430.84
  4. Step 4: Simplify right side
    15,504.57x = 180,387,517.27
  5. Step 5: Solve for x
    x = 180,387,517.27/15,504.57
  6. Step 6: Final answer
    x = 11,634.47

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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.