Home / 28,389.76-42,540.84-17,979.64

Finding the Fourth Proportional to 28,389.76, 42,540.84 and 17,979.64

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Solution

The fourth proportional to 28,389.76, 42,540.84 and 17,979.64 is: 26,941.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.76 : 42,540.84 = 17,979.64 : x
  2. Step 2: Convert to fraction form
    28,389.76/42,540.84 = 17,979.64/x
  3. Step 3: Cross multiply
    28,389.76x = 42,540.84 × 17,979.64
  4. Step 4: Simplify right side
    28,389.76x = 764,868,988.50
  5. Step 5: Solve for x
    x = 764,868,988.50/28,389.76
  6. Step 6: Final answer
    x = 26,941.72

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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.