Home / 28,441.12-42,658.80-7,666.72

Finding the Fourth Proportional to 28,441.12, 42,658.80 and 7,666.72

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Solution

The fourth proportional to 28,441.12, 42,658.80 and 7,666.72 is: 11,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,441.12 : 42,658.80 = 7,666.72 : x
  2. Step 2: Convert to fraction form
    28,441.12/42,658.80 = 7,666.72/x
  3. Step 3: Cross multiply
    28,441.12x = 42,658.80 × 7,666.72
  4. Step 4: Simplify right side
    28,441.12x = 327,053,075.14
  5. Step 5: Solve for x
    x = 327,053,075.14/28,441.12
  6. Step 6: Final answer
    x = 11,499.30

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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.