Home / 12,742.74-17,581.80-7,639.06

Finding the Fourth Proportional to 12,742.74, 17,581.80 and 7,639.06

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Solution

The fourth proportional to 12,742.74, 17,581.80 and 7,639.06 is: 10,540.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.74 : 17,581.80 = 7,639.06 : x
  2. Step 2: Convert to fraction form
    12,742.74/17,581.80 = 7,639.06/x
  3. Step 3: Cross multiply
    12,742.74x = 17,581.80 × 7,639.06
  4. Step 4: Simplify right side
    12,742.74x = 134,308,425.11
  5. Step 5: Solve for x
    x = 134,308,425.11/12,742.74
  6. Step 6: Final answer
    x = 10,540.00

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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.