Home / 28,089.09-42,134.54-12,285.99

Finding the Fourth Proportional to 28,089.09, 42,134.54 and 12,285.99

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Solution

The fourth proportional to 28,089.09, 42,134.54 and 12,285.99 is: 18,429.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.09 : 42,134.54 = 12,285.99 : x
  2. Step 2: Convert to fraction form
    28,089.09/42,134.54 = 12,285.99/x
  3. Step 3: Cross multiply
    28,089.09x = 42,134.54 × 12,285.99
  4. Step 4: Simplify right side
    28,089.09x = 517,664,475.66
  5. Step 5: Solve for x
    x = 517,664,475.66/28,089.09
  6. Step 6: Final answer
    x = 18,429.38

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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.