Home / 20,205.60-30,326.40-11,875.20

Finding the Fourth Proportional to 20,205.60, 30,326.40 and 11,875.20

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Solution

The fourth proportional to 20,205.60, 30,326.40 and 11,875.20 is: 17,823.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.60 : 30,326.40 = 11,875.20 : x
  2. Step 2: Convert to fraction form
    20,205.60/30,326.40 = 11,875.20/x
  3. Step 3: Cross multiply
    20,205.60x = 30,326.40 × 11,875.20
  4. Step 4: Simplify right side
    20,205.60x = 360,132,065.28
  5. Step 5: Solve for x
    x = 360,132,065.28/20,205.60
  6. Step 6: Final answer
    x = 17,823.38

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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.