Home / 13,612.05-18,785.70-7,643.34

Finding the Fourth Proportional to 13,612.05, 18,785.70 and 7,643.34

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Solution

The fourth proportional to 13,612.05, 18,785.70 and 7,643.34 is: 10,548.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.05 : 18,785.70 = 7,643.34 : x
  2. Step 2: Convert to fraction form
    13,612.05/18,785.70 = 7,643.34/x
  3. Step 3: Cross multiply
    13,612.05x = 18,785.70 × 7,643.34
  4. Step 4: Simplify right side
    13,612.05x = 143,585,492.24
  5. Step 5: Solve for x
    x = 143,585,492.24/13,612.05
  6. Step 6: Final answer
    x = 10,548.41

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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.