Home / 20,390.40-30,585.60-7,244.10

Finding the Fourth Proportional to 20,390.40, 30,585.60 and 7,244.10

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Solution

The fourth proportional to 20,390.40, 30,585.60 and 7,244.10 is: 10,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.40 : 30,585.60 = 7,244.10 : x
  2. Step 2: Convert to fraction form
    20,390.40/30,585.60 = 7,244.10/x
  3. Step 3: Cross multiply
    20,390.40x = 30,585.60 × 7,244.10
  4. Step 4: Simplify right side
    20,390.40x = 221,565,144.96
  5. Step 5: Solve for x
    x = 221,565,144.96/20,390.40
  6. Step 6: Final answer
    x = 10,866.15

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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.