Home / 21,785,416.80-32,678,125.20-20,143,125.60

Finding the Fourth Proportional to 21,785,416.80, 32,678,125.20 and 20,143,125.60

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Solution

The fourth proportional to 21,785,416.80, 32,678,125.20 and 20,143,125.60 is: 30,214,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785,416.80 : 32,678,125.20 = 20,143,125.60 : x
  2. Step 2: Convert to fraction form
    21,785,416.80/32,678,125.20 = 20,143,125.60/x
  3. Step 3: Cross multiply
    21,785,416.80x = 32,678,125.20 × 20,143,125.60
  4. Step 4: Simplify right side
    21,785,416.80x = 658,239,580,276,125.12
  5. Step 5: Solve for x
    x = 658,239,580,276,125.12/21,785,416.80
  6. Step 6: Final answer
    x = 30,214,688.40

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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.