Home / 13,133.76-18,124.16-7,165.36

Finding the Fourth Proportional to 13,133.76, 18,124.16 and 7,165.36

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Solution

The fourth proportional to 13,133.76, 18,124.16 and 7,165.36 is: 9,887.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.76 : 18,124.16 = 7,165.36 : x
  2. Step 2: Convert to fraction form
    13,133.76/18,124.16 = 7,165.36/x
  3. Step 3: Cross multiply
    13,133.76x = 18,124.16 × 7,165.36
  4. Step 4: Simplify right side
    13,133.76x = 129,866,131.10
  5. Step 5: Solve for x
    x = 129,866,131.10/13,133.76
  6. Step 6: Final answer
    x = 9,887.96

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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.