Home / 10,521.36-15,780.15-5,254.61

Finding the Fourth Proportional to 10,521.36, 15,780.15 and 5,254.61

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Solution

The fourth proportional to 10,521.36, 15,780.15 and 5,254.61 is: 7,880.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.36 : 15,780.15 = 5,254.61 : x
  2. Step 2: Convert to fraction form
    10,521.36/15,780.15 = 5,254.61/x
  3. Step 3: Cross multiply
    10,521.36x = 15,780.15 × 5,254.61
  4. Step 4: Simplify right side
    10,521.36x = 82,918,455.09
  5. Step 5: Solve for x
    x = 82,918,455.09/10,521.36
  6. Step 6: Final answer
    x = 7,880.96

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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.