Home / 10,521.05-15,784.01-3,125.35

Finding the Fourth Proportional to 10,521.05, 15,784.01 and 3,125.35

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Solution

The fourth proportional to 10,521.05, 15,784.01 and 3,125.35 is: 4,688.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.05 : 15,784.01 = 3,125.35 : x
  2. Step 2: Convert to fraction form
    10,521.05/15,784.01 = 3,125.35/x
  3. Step 3: Cross multiply
    10,521.05x = 15,784.01 × 3,125.35
  4. Step 4: Simplify right side
    10,521.05x = 49,330,555.65
  5. Step 5: Solve for x
    x = 49,330,555.65/10,521.05
  6. Step 6: Final answer
    x = 4,688.75

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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.