Home / 34,280.80-51,421.20-21,090.40

Finding the Fourth Proportional to 34,280.80, 51,421.20 and 21,090.40

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Solution

The fourth proportional to 34,280.80, 51,421.20 and 21,090.40 is: 31,635.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,280.80 : 51,421.20 = 21,090.40 : x
  2. Step 2: Convert to fraction form
    34,280.80/51,421.20 = 21,090.40/x
  3. Step 3: Cross multiply
    34,280.80x = 51,421.20 × 21,090.40
  4. Step 4: Simplify right side
    34,280.80x = 1,084,493,676.48
  5. Step 5: Solve for x
    x = 1,084,493,676.48/34,280.80
  6. Step 6: Final answer
    x = 31,635.60

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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.