Home / 20,347,280.20-30,520,920.30-18,788,386.60

Finding the Fourth Proportional to 20,347,280.20, 30,520,920.30 and 18,788,386.60

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Solution

The fourth proportional to 20,347,280.20, 30,520,920.30 and 18,788,386.60 is: 28,182,579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347,280.20 : 30,520,920.30 = 18,788,386.60 : x
  2. Step 2: Convert to fraction form
    20,347,280.20/30,520,920.30 = 18,788,386.60/x
  3. Step 3: Cross multiply
    20,347,280.20x = 30,520,920.30 × 18,788,386.60
  4. Step 4: Simplify right side
    20,347,280.20x = 573,438,849,984,188
  5. Step 5: Solve for x
    x = 573,438,849,984,188/20,347,280.20
  6. Step 6: Final answer
    x = 28,182,579.90

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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.