Home / 20,430.02-30,646.80-5,638.94

Finding the Fourth Proportional to 20,430.02, 30,646.80 and 5,638.94

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Solution

The fourth proportional to 20,430.02, 30,646.80 and 5,638.94 is: 8,458.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.02 : 30,646.80 = 5,638.94 : x
  2. Step 2: Convert to fraction form
    20,430.02/30,646.80 = 5,638.94/x
  3. Step 3: Cross multiply
    20,430.02x = 30,646.80 × 5,638.94
  4. Step 4: Simplify right side
    20,430.02x = 172,815,466.39
  5. Step 5: Solve for x
    x = 172,815,466.39/20,430.02
  6. Step 6: Final answer
    x = 8,458.90

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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.