Home / 20,421.83-30,645.02-8,735.06

Finding the Fourth Proportional to 20,421.83, 30,645.02 and 8,735.06

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Solution

The fourth proportional to 20,421.83, 30,645.02 and 8,735.06 is: 13,107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.83 : 30,645.02 = 8,735.06 : x
  2. Step 2: Convert to fraction form
    20,421.83/30,645.02 = 8,735.06/x
  3. Step 3: Cross multiply
    20,421.83x = 30,645.02 × 8,735.06
  4. Step 4: Simplify right side
    20,421.83x = 267,686,088.40
  5. Step 5: Solve for x
    x = 267,686,088.40/20,421.83
  6. Step 6: Final answer
    x = 13,107.84

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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.