Home / 15,349.20-21,181.20-8,635.20

Finding the Fourth Proportional to 15,349.20, 21,181.20 and 8,635.20

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Solution

The fourth proportional to 15,349.20, 21,181.20 and 8,635.20 is: 11,916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,349.20 : 21,181.20 = 8,635.20 : x
  2. Step 2: Convert to fraction form
    15,349.20/21,181.20 = 8,635.20/x
  3. Step 3: Cross multiply
    15,349.20x = 21,181.20 × 8,635.20
  4. Step 4: Simplify right side
    15,349.20x = 182,903,898.24
  5. Step 5: Solve for x
    x = 182,903,898.24/15,349.20
  6. Step 6: Final answer
    x = 11,916.18

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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.