Home / 28,079.58-42,082.80-11,420.16

Finding the Fourth Proportional to 28,079.58, 42,082.80 and 11,420.16

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Solution

The fourth proportional to 28,079.58, 42,082.80 and 11,420.16 is: 17,115.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.58 : 42,082.80 = 11,420.16 : x
  2. Step 2: Convert to fraction form
    28,079.58/42,082.80 = 11,420.16/x
  3. Step 3: Cross multiply
    28,079.58x = 42,082.80 × 11,420.16
  4. Step 4: Simplify right side
    28,079.58x = 480,592,309.25
  5. Step 5: Solve for x
    x = 480,592,309.25/28,079.58
  6. Step 6: Final answer
    x = 17,115.37

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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.