Home / 13,612.28-18,783.88-7,644.84

Finding the Fourth Proportional to 13,612.28, 18,783.88 and 7,644.84

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Solution

The fourth proportional to 13,612.28, 18,783.88 and 7,644.84 is: 10,549.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.28 : 18,783.88 = 7,644.84 : x
  2. Step 2: Convert to fraction form
    13,612.28/18,783.88 = 7,644.84/x
  3. Step 3: Cross multiply
    13,612.28x = 18,783.88 × 7,644.84
  4. Step 4: Simplify right side
    13,612.28x = 143,599,757.18
  5. Step 5: Solve for x
    x = 143,599,757.18/13,612.28
  6. Step 6: Final answer
    x = 10,549.28

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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.