Home / 7,478.35-10,319.98-4,121.47

Finding the Fourth Proportional to 7,478.35, 10,319.98 and 4,121.47

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Solution

The fourth proportional to 7,478.35, 10,319.98 and 4,121.47 is: 5,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.35 : 10,319.98 = 4,121.47 : x
  2. Step 2: Convert to fraction form
    7,478.35/10,319.98 = 4,121.47/x
  3. Step 3: Cross multiply
    7,478.35x = 10,319.98 × 4,121.47
  4. Step 4: Simplify right side
    7,478.35x = 42,533,487.97
  5. Step 5: Solve for x
    x = 42,533,487.97/7,478.35
  6. Step 6: Final answer
    x = 5,687.55

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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.