Home / 13,383.08-18,468.54-7,715.76

Finding the Fourth Proportional to 13,383.08, 18,468.54 and 7,715.76

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Solution

The fourth proportional to 13,383.08, 18,468.54 and 7,715.76 is: 10,647.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.08 : 18,468.54 = 7,715.76 : x
  2. Step 2: Convert to fraction form
    13,383.08/18,468.54 = 7,715.76/x
  3. Step 3: Cross multiply
    13,383.08x = 18,468.54 × 7,715.76
  4. Step 4: Simplify right side
    13,383.08x = 142,498,822.19
  5. Step 5: Solve for x
    x = 142,498,822.19/13,383.08
  6. Step 6: Final answer
    x = 10,647.69

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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.