Home / 13,390.79-18,465.71-8,082.45

Finding the Fourth Proportional to 13,390.79, 18,465.71 and 8,082.45

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Solution

The fourth proportional to 13,390.79, 18,465.71 and 8,082.45 is: 11,145.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.79 : 18,465.71 = 8,082.45 : x
  2. Step 2: Convert to fraction form
    13,390.79/18,465.71 = 8,082.45/x
  3. Step 3: Cross multiply
    13,390.79x = 18,465.71 × 8,082.45
  4. Step 4: Simplify right side
    13,390.79x = 149,248,137.38
  5. Step 5: Solve for x
    x = 149,248,137.38/13,390.79
  6. Step 6: Final answer
    x = 11,145.59

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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.