Home / 13,118.86-18,115.35-11,248.98

Finding the Fourth Proportional to 13,118.86, 18,115.35 and 11,248.98

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Solution

The fourth proportional to 13,118.86, 18,115.35 and 11,248.98 is: 15,533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.86 : 18,115.35 = 11,248.98 : x
  2. Step 2: Convert to fraction form
    13,118.86/18,115.35 = 11,248.98/x
  3. Step 3: Cross multiply
    13,118.86x = 18,115.35 × 11,248.98
  4. Step 4: Simplify right side
    13,118.86x = 203,779,099.73
  5. Step 5: Solve for x
    x = 203,779,099.73/13,118.86
  6. Step 6: Final answer
    x = 15,533.29

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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.