Home / 10,253.10-15,378.74-2,857.40

Finding the Fourth Proportional to 10,253.10, 15,378.74 and 2,857.40

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Solution

The fourth proportional to 10,253.10, 15,378.74 and 2,857.40 is: 4,285.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,253.10 : 15,378.74 = 2,857.40 : x
  2. Step 2: Convert to fraction form
    10,253.10/15,378.74 = 2,857.40/x
  3. Step 3: Cross multiply
    10,253.10x = 15,378.74 × 2,857.40
  4. Step 4: Simplify right side
    10,253.10x = 43,943,211.68
  5. Step 5: Solve for x
    x = 43,943,211.68/10,253.10
  6. Step 6: Final answer
    x = 4,285.85

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1.5x scale

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.