Home / 18,961.80-28,434.42-10,075.20

Finding the Fourth Proportional to 18,961.80, 28,434.42 and 10,075.20

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Solution

The fourth proportional to 18,961.80, 28,434.42 and 10,075.20 is: 15,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.80 : 28,434.42 = 10,075.20 : x
  2. Step 2: Convert to fraction form
    18,961.80/28,434.42 = 10,075.20/x
  3. Step 3: Cross multiply
    18,961.80x = 28,434.42 × 10,075.20
  4. Step 4: Simplify right side
    18,961.80x = 286,482,468.38
  5. Step 5: Solve for x
    x = 286,482,468.38/18,961.80
  6. Step 6: Final answer
    x = 15,108.40

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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.