Home / 10,215.10-15,322.35-2,820.01

Finding the Fourth Proportional to 10,215.10, 15,322.35 and 2,820.01

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Solution

The fourth proportional to 10,215.10, 15,322.35 and 2,820.01 is: 4,229.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.10 : 15,322.35 = 2,820.01 : x
  2. Step 2: Convert to fraction form
    10,215.10/15,322.35 = 2,820.01/x
  3. Step 3: Cross multiply
    10,215.10x = 15,322.35 × 2,820.01
  4. Step 4: Simplify right side
    10,215.10x = 43,209,166.12
  5. Step 5: Solve for x
    x = 43,209,166.12/10,215.10
  6. Step 6: Final answer
    x = 4,229.93

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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.