Home / 18,715.20-28,075.68-8,859.84

Finding the Fourth Proportional to 18,715.20, 28,075.68 and 8,859.84

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Solution

The fourth proportional to 18,715.20, 28,075.68 and 8,859.84 is: 13,291.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.20 : 28,075.68 = 8,859.84 : x
  2. Step 2: Convert to fraction form
    18,715.20/28,075.68 = 8,859.84/x
  3. Step 3: Cross multiply
    18,715.20x = 28,075.68 × 8,859.84
  4. Step 4: Simplify right side
    18,715.20x = 248,746,032.69
  5. Step 5: Solve for x
    x = 248,746,032.69/18,715.20
  6. Step 6: Final answer
    x = 13,291.12

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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.