Home / 15,421.35-21,282.72-8,708.61

Finding the Fourth Proportional to 15,421.35, 21,282.72 and 8,708.61

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Solution

The fourth proportional to 15,421.35, 21,282.72 and 8,708.61 is: 12,018.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.35 : 21,282.72 = 8,708.61 : x
  2. Step 2: Convert to fraction form
    15,421.35/21,282.72 = 8,708.61/x
  3. Step 3: Cross multiply
    15,421.35x = 21,282.72 × 8,708.61
  4. Step 4: Simplify right side
    15,421.35x = 185,342,908.22
  5. Step 5: Solve for x
    x = 185,342,908.22/15,421.35
  6. Step 6: Final answer
    x = 12,018.59

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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.