Home / 18,312.40-27,468.60-7,779.70

Finding the Fourth Proportional to 18,312.40, 27,468.60 and 7,779.70

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Solution

The fourth proportional to 18,312.40, 27,468.60 and 7,779.70 is: 11,669.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,312.40 : 27,468.60 = 7,779.70 : x
  2. Step 2: Convert to fraction form
    18,312.40/27,468.60 = 7,779.70/x
  3. Step 3: Cross multiply
    18,312.40x = 27,468.60 × 7,779.70
  4. Step 4: Simplify right side
    18,312.40x = 213,697,467.42
  5. Step 5: Solve for x
    x = 213,697,467.42/18,312.40
  6. Step 6: Final answer
    x = 11,669.55

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Similar ratio
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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.