Home / 20,421.10-30,612.20-6,560.38

Finding the Fourth Proportional to 20,421.10, 30,612.20 and 6,560.38

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Solution

The fourth proportional to 20,421.10, 30,612.20 and 6,560.38 is: 9,834.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.10 : 30,612.20 = 6,560.38 : x
  2. Step 2: Convert to fraction form
    20,421.10/30,612.20 = 6,560.38/x
  3. Step 3: Cross multiply
    20,421.10x = 30,612.20 × 6,560.38
  4. Step 4: Simplify right side
    20,421.10x = 200,827,664.64
  5. Step 5: Solve for x
    x = 200,827,664.64/20,421.10
  6. Step 6: Final answer
    x = 9,834.32

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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.