Home / 28,389.79-42,589.85-11,740.78

Finding the Fourth Proportional to 28,389.79, 42,589.85 and 11,740.78

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Solution

The fourth proportional to 28,389.79, 42,589.85 and 11,740.78 is: 17,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.79 : 42,589.85 = 11,740.78 : x
  2. Step 2: Convert to fraction form
    28,389.79/42,589.85 = 11,740.78/x
  3. Step 3: Cross multiply
    28,389.79x = 42,589.85 × 11,740.78
  4. Step 4: Simplify right side
    28,389.79x = 500,037,893.90
  5. Step 5: Solve for x
    x = 500,037,893.90/28,389.79
  6. Step 6: Final answer
    x = 17,613.30

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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.