Home / 25,979.40-38,969.10-18,106.20

Finding the Fourth Proportional to 25,979.40, 38,969.10 and 18,106.20

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Solution

The fourth proportional to 25,979.40, 38,969.10 and 18,106.20 is: 27,159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,979.40 : 38,969.10 = 18,106.20 : x
  2. Step 2: Convert to fraction form
    25,979.40/38,969.10 = 18,106.20/x
  3. Step 3: Cross multiply
    25,979.40x = 38,969.10 × 18,106.20
  4. Step 4: Simplify right side
    25,979.40x = 705,582,318.42
  5. Step 5: Solve for x
    x = 705,582,318.42/25,979.40
  6. Step 6: Final answer
    x = 27,159.30

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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.