Home / 19,075.20-28,645.20-12,530.40

Finding the Fourth Proportional to 19,075.20, 28,645.20 and 12,530.40

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Solution

The fourth proportional to 19,075.20, 28,645.20 and 12,530.40 is: 18,816.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,075.20 : 28,645.20 = 12,530.40 : x
  2. Step 2: Convert to fraction form
    19,075.20/28,645.20 = 12,530.40/x
  3. Step 3: Cross multiply
    19,075.20x = 28,645.20 × 12,530.40
  4. Step 4: Simplify right side
    19,075.20x = 358,935,814.08
  5. Step 5: Solve for x
    x = 358,935,814.08/19,075.20
  6. Step 6: Final answer
    x = 18,816.88

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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.