Home / 13,181.60-19,772.40-5,390.42

Finding the Fourth Proportional to 13,181.60, 19,772.40 and 5,390.42

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Solution

The fourth proportional to 13,181.60, 19,772.40 and 5,390.42 is: 8,085.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.60 : 19,772.40 = 5,390.42 : x
  2. Step 2: Convert to fraction form
    13,181.60/19,772.40 = 5,390.42/x
  3. Step 3: Cross multiply
    13,181.60x = 19,772.40 × 5,390.42
  4. Step 4: Simplify right side
    13,181.60x = 106,581,461.76
  5. Step 5: Solve for x
    x = 106,581,461.76/13,181.60
  6. Step 6: Final answer
    x = 8,085.62

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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.