Home / 28,189.32-42,282.84-7,129.08

Finding the Fourth Proportional to 28,189.32, 42,282.84 and 7,129.08

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Solution

The fourth proportional to 28,189.32, 42,282.84 and 7,129.08 is: 10,693.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.32 : 42,282.84 = 7,129.08 : x
  2. Step 2: Convert to fraction form
    28,189.32/42,282.84 = 7,129.08/x
  3. Step 3: Cross multiply
    28,189.32x = 42,282.84 × 7,129.08
  4. Step 4: Simplify right side
    28,189.32x = 301,437,748.99
  5. Step 5: Solve for x
    x = 301,437,748.99/28,189.32
  6. Step 6: Final answer
    x = 10,693.33

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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.