Home / 7,175.20-9,901.64-3,988.46

Finding the Fourth Proportional to 7,175.20, 9,901.64 and 3,988.46

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Solution

The fourth proportional to 7,175.20, 9,901.64 and 3,988.46 is: 5,504.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.20 : 9,901.64 = 3,988.46 : x
  2. Step 2: Convert to fraction form
    7,175.20/9,901.64 = 3,988.46/x
  3. Step 3: Cross multiply
    7,175.20x = 9,901.64 × 3,988.46
  4. Step 4: Simplify right side
    7,175.20x = 39,492,295.07
  5. Step 5: Solve for x
    x = 39,492,295.07/7,175.20
  6. Step 6: Final answer
    x = 5,504.00

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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.