Home / 7,124.28-9,828.72-4,139.57

Finding the Fourth Proportional to 7,124.28, 9,828.72 and 4,139.57

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Solution

The fourth proportional to 7,124.28, 9,828.72 and 4,139.57 is: 5,710.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.28 : 9,828.72 = 4,139.57 : x
  2. Step 2: Convert to fraction form
    7,124.28/9,828.72 = 4,139.57/x
  3. Step 3: Cross multiply
    7,124.28x = 9,828.72 × 4,139.57
  4. Step 4: Simplify right side
    7,124.28x = 40,686,625.31
  5. Step 5: Solve for x
    x = 40,686,625.31/7,124.28
  6. Step 6: Final answer
    x = 5,710.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.