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Finding the Fourth Proportional to 7,300.76, 10,075.28 and 3,988.76

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Solution

The fourth proportional to 7,300.76, 10,075.28 and 3,988.76 is: 5,504.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,300.76 : 10,075.28 = 3,988.76 : x
  2. Step 2: Convert to fraction form
    7,300.76/10,075.28 = 3,988.76/x
  3. Step 3: Cross multiply
    7,300.76x = 10,075.28 × 3,988.76
  4. Step 4: Simplify right side
    7,300.76x = 40,187,873.85
  5. Step 5: Solve for x
    x = 40,187,873.85/7,300.76
  6. Step 6: Final answer
    x = 5,504.62

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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.