Home / 7,478.49-10,320.09-4,121.28

Finding the Fourth Proportional to 7,478.49, 10,320.09 and 4,121.28

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Solution

The fourth proportional to 7,478.49, 10,320.09 and 4,121.28 is: 5,687.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.49 : 10,320.09 = 4,121.28 : x
  2. Step 2: Convert to fraction form
    7,478.49/10,320.09 = 4,121.28/x
  3. Step 3: Cross multiply
    7,478.49x = 10,320.09 × 4,121.28
  4. Step 4: Simplify right side
    7,478.49x = 42,531,980.52
  5. Step 5: Solve for x
    x = 42,531,980.52/7,478.49
  6. Step 6: Final answer
    x = 5,687.24

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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.