Home / 10,145.30-15,219.40-3,125.90

Finding the Fourth Proportional to 10,145.30, 15,219.40 and 3,125.90

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Solution

The fourth proportional to 10,145.30, 15,219.40 and 3,125.90 is: 4,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,145.30 : 15,219.40 = 3,125.90 : x
  2. Step 2: Convert to fraction form
    10,145.30/15,219.40 = 3,125.90/x
  3. Step 3: Cross multiply
    10,145.30x = 15,219.40 × 3,125.90
  4. Step 4: Simplify right side
    10,145.30x = 47,574,322.46
  5. Step 5: Solve for x
    x = 47,574,322.46/10,145.30
  6. Step 6: Final answer
    x = 4,689.30

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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.