Home / 18,715.84-28,075.14-5,388.30

Finding the Fourth Proportional to 18,715.84, 28,075.14 and 5,388.30

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Solution

The fourth proportional to 18,715.84, 28,075.14 and 5,388.30 is: 8,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.84 : 28,075.14 = 5,388.30 : x
  2. Step 2: Convert to fraction form
    18,715.84/28,075.14 = 5,388.30/x
  3. Step 3: Cross multiply
    18,715.84x = 28,075.14 × 5,388.30
  4. Step 4: Simplify right side
    18,715.84x = 151,277,276.86
  5. Step 5: Solve for x
    x = 151,277,276.86/18,715.84
  6. Step 6: Final answer
    x = 8,082.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.