Home / 15,695.12-21,658.20-8,621.84

Finding the Fourth Proportional to 15,695.12, 21,658.20 and 8,621.84

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Solution

The fourth proportional to 15,695.12, 21,658.20 and 8,621.84 is: 11,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,695.12 : 21,658.20 = 8,621.84 : x
  2. Step 2: Convert to fraction form
    15,695.12/21,658.20 = 8,621.84/x
  3. Step 3: Cross multiply
    15,695.12x = 21,658.20 × 8,621.84
  4. Step 4: Simplify right side
    15,695.12x = 186,733,535.09
  5. Step 5: Solve for x
    x = 186,733,535.09/15,695.12
  6. Step 6: Final answer
    x = 11,897.55

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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.