Home / 13,156.24-18,148.08-8,435.20

Finding the Fourth Proportional to 13,156.24, 18,148.08 and 8,435.20

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Solution

The fourth proportional to 13,156.24, 18,148.08 and 8,435.20 is: 11,635.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.24 : 18,148.08 = 8,435.20 : x
  2. Step 2: Convert to fraction form
    13,156.24/18,148.08 = 8,435.20/x
  3. Step 3: Cross multiply
    13,156.24x = 18,148.08 × 8,435.20
  4. Step 4: Simplify right side
    13,156.24x = 153,082,684.42
  5. Step 5: Solve for x
    x = 153,082,684.42/13,156.24
  6. Step 6: Final answer
    x = 11,635.75

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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.