Home / 13,178.60-18,187.22-7,515.08

Finding the Fourth Proportional to 13,178.60, 18,187.22 and 7,515.08

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Solution

The fourth proportional to 13,178.60, 18,187.22 and 7,515.08 is: 10,371.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.60 : 18,187.22 = 7,515.08 : x
  2. Step 2: Convert to fraction form
    13,178.60/18,187.22 = 7,515.08/x
  3. Step 3: Cross multiply
    13,178.60x = 18,187.22 × 7,515.08
  4. Step 4: Simplify right side
    13,178.60x = 136,678,284.77
  5. Step 5: Solve for x
    x = 136,678,284.77/13,178.60
  6. Step 6: Final answer
    x = 10,371.23

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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.