Home / 13,384.36-18,471.54-7,720.12

Finding the Fourth Proportional to 13,384.36, 18,471.54 and 7,720.12

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Solution

The fourth proportional to 13,384.36, 18,471.54 and 7,720.12 is: 10,654.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.36 : 18,471.54 = 7,720.12 : x
  2. Step 2: Convert to fraction form
    13,384.36/18,471.54 = 7,720.12/x
  3. Step 3: Cross multiply
    13,384.36x = 18,471.54 × 7,720.12
  4. Step 4: Simplify right side
    13,384.36x = 142,602,505.38
  5. Step 5: Solve for x
    x = 142,602,505.38/13,384.36
  6. Step 6: Final answer
    x = 10,654.41

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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.