Home / 10,521.37-15,784.48-3,125.66

Finding the Fourth Proportional to 10,521.37, 15,784.48 and 3,125.66

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Solution

The fourth proportional to 10,521.37, 15,784.48 and 3,125.66 is: 4,689.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.37 : 15,784.48 = 3,125.66 : x
  2. Step 2: Convert to fraction form
    10,521.37/15,784.48 = 3,125.66/x
  3. Step 3: Cross multiply
    10,521.37x = 15,784.48 × 3,125.66
  4. Step 4: Simplify right side
    10,521.37x = 49,336,917.76
  5. Step 5: Solve for x
    x = 49,336,917.76/10,521.37
  6. Step 6: Final answer
    x = 4,689.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.