Home / 13,915.20-19,212.48-9,724.80

Finding the Fourth Proportional to 13,915.20, 19,212.48 and 9,724.80

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Solution

The fourth proportional to 13,915.20, 19,212.48 and 9,724.80 is: 13,426.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.20 : 19,212.48 = 9,724.80 : x
  2. Step 2: Convert to fraction form
    13,915.20/19,212.48 = 9,724.80/x
  3. Step 3: Cross multiply
    13,915.20x = 19,212.48 × 9,724.80
  4. Step 4: Simplify right side
    13,915.20x = 186,837,525.50
  5. Step 5: Solve for x
    x = 186,837,525.50/13,915.20
  6. Step 6: Final answer
    x = 13,426.87

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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.