Home / 15,660.30-21,611.10-8,586.60

Finding the Fourth Proportional to 15,660.30, 21,611.10 and 8,586.60

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Solution

The fourth proportional to 15,660.30, 21,611.10 and 8,586.60 is: 11,849.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.30 : 21,611.10 = 8,586.60 : x
  2. Step 2: Convert to fraction form
    15,660.30/21,611.10 = 8,586.60/x
  3. Step 3: Cross multiply
    15,660.30x = 21,611.10 × 8,586.60
  4. Step 4: Simplify right side
    15,660.30x = 185,565,871.26
  5. Step 5: Solve for x
    x = 185,565,871.26/15,660.30
  6. Step 6: Final answer
    x = 11,849.45

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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.