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Finding the Fourth Proportional to 13,015.40, 17,961.04 and 7,047.02

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Solution

The fourth proportional to 13,015.40, 17,961.04 and 7,047.02 is: 9,724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.40 : 17,961.04 = 7,047.02 : x
  2. Step 2: Convert to fraction form
    13,015.40/17,961.04 = 7,047.02/x
  3. Step 3: Cross multiply
    13,015.40x = 17,961.04 × 7,047.02
  4. Step 4: Simplify right side
    13,015.40x = 126,571,808.10
  5. Step 5: Solve for x
    x = 126,571,808.10/13,015.40
  6. Step 6: Final answer
    x = 9,724.77

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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.