Home / 28,442.88-42,687.57-20,130.99

Finding the Fourth Proportional to 28,442.88, 42,687.57 and 20,130.99

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Solution

The fourth proportional to 28,442.88, 42,687.57 and 20,130.99 is: 30,212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.88 : 42,687.57 = 20,130.99 : x
  2. Step 2: Convert to fraction form
    28,442.88/42,687.57 = 20,130.99/x
  3. Step 3: Cross multiply
    28,442.88x = 42,687.57 × 20,130.99
  4. Step 4: Simplify right side
    28,442.88x = 859,343,044.79
  5. Step 5: Solve for x
    x = 859,343,044.79/28,442.88
  6. Step 6: Final answer
    x = 30,212.94

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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.