Home / 28,389.31-42,589.10-11,740.30

Finding the Fourth Proportional to 28,389.31, 42,589.10 and 11,740.30

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Solution

The fourth proportional to 28,389.31, 42,589.10 and 11,740.30 is: 17,612.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.31 : 42,589.10 = 11,740.30 : x
  2. Step 2: Convert to fraction form
    28,389.31/42,589.10 = 11,740.30/x
  3. Step 3: Cross multiply
    28,389.31x = 42,589.10 × 11,740.30
  4. Step 4: Simplify right side
    28,389.31x = 500,008,810.73
  5. Step 5: Solve for x
    x = 500,008,810.73/28,389.31
  6. Step 6: Final answer
    x = 17,612.57

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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.