Home / 5,215.10-7,803.21-5,156.78

Finding the Fourth Proportional to 5,215.10, 7,803.21 and 5,156.78

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Solution

The fourth proportional to 5,215.10, 7,803.21 and 5,156.78 is: 7,715.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.10 : 7,803.21 = 5,156.78 : x
  2. Step 2: Convert to fraction form
    5,215.10/7,803.21 = 5,156.78/x
  3. Step 3: Cross multiply
    5,215.10x = 7,803.21 × 5,156.78
  4. Step 4: Simplify right side
    5,215.10x = 40,239,437.26
  5. Step 5: Solve for x
    x = 40,239,437.26/5,215.10
  6. Step 6: Final answer
    x = 7,715.95

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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.