Home / 13,630.40-18,811.51-7,581.25

Finding the Fourth Proportional to 13,630.40, 18,811.51 and 7,581.25

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Solution

The fourth proportional to 13,630.40, 18,811.51 and 7,581.25 is: 10,463.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.40 : 18,811.51 = 7,581.25 : x
  2. Step 2: Convert to fraction form
    13,630.40/18,811.51 = 7,581.25/x
  3. Step 3: Cross multiply
    13,630.40x = 18,811.51 × 7,581.25
  4. Step 4: Simplify right side
    13,630.40x = 142,614,816.69
  5. Step 5: Solve for x
    x = 142,614,816.69/13,630.40
  6. Step 6: Final answer
    x = 10,463.00

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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.