Home / 15,835.16-21,855.20-9,119.55

Finding the Fourth Proportional to 15,835.16, 21,855.20 and 9,119.55

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Solution

The fourth proportional to 15,835.16, 21,855.20 and 9,119.55 is: 12,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,835.16 : 21,855.20 = 9,119.55 : x
  2. Step 2: Convert to fraction form
    15,835.16/21,855.20 = 9,119.55/x
  3. Step 3: Cross multiply
    15,835.16x = 21,855.20 × 9,119.55
  4. Step 4: Simplify right side
    15,835.16x = 199,309,434.29
  5. Step 5: Solve for x
    x = 199,309,434.29/15,835.16
  6. Step 6: Final answer
    x = 12,586.52

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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.