Home / 10,521.28-15,784.16-3,126.08

Finding the Fourth Proportional to 10,521.28, 15,784.16 and 3,126.08

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Solution

The fourth proportional to 10,521.28, 15,784.16 and 3,126.08 is: 4,689.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.28 : 15,784.16 = 3,126.08 : x
  2. Step 2: Convert to fraction form
    10,521.28/15,784.16 = 3,126.08/x
  3. Step 3: Cross multiply
    10,521.28x = 15,784.16 × 3,126.08
  4. Step 4: Simplify right side
    10,521.28x = 49,342,546.89
  5. Step 5: Solve for x
    x = 49,342,546.89/10,521.28
  6. Step 6: Final answer
    x = 4,689.79

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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.