Home / 7,485.40-10,329.92-4,128.34

Finding the Fourth Proportional to 7,485.40, 10,329.92 and 4,128.34

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Solution

The fourth proportional to 7,485.40, 10,329.92 and 4,128.34 is: 5,697.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.40 : 10,329.92 = 4,128.34 : x
  2. Step 2: Convert to fraction form
    7,485.40/10,329.92 = 4,128.34/x
  3. Step 3: Cross multiply
    7,485.40x = 10,329.92 × 4,128.34
  4. Step 4: Simplify right side
    7,485.40x = 42,645,432.57
  5. Step 5: Solve for x
    x = 42,645,432.57/7,485.40
  6. Step 6: Final answer
    x = 5,697.15

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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.