Home / 13,658.08-20,478.56-11,312.32

Finding the Fourth Proportional to 13,658.08, 20,478.56 and 11,312.32

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Solution

The fourth proportional to 13,658.08, 20,478.56 and 11,312.32 is: 16,961.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.08 : 20,478.56 = 11,312.32 : x
  2. Step 2: Convert to fraction form
    13,658.08/20,478.56 = 11,312.32/x
  3. Step 3: Cross multiply
    13,658.08x = 20,478.56 × 11,312.32
  4. Step 4: Simplify right side
    13,658.08x = 231,660,023.86
  5. Step 5: Solve for x
    x = 231,660,023.86/13,658.08
  6. Step 6: Final answer
    x = 16,961.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.