Home / 28,353.12-39,126.64-15,777.60

Finding the Fourth Proportional to 28,353.12, 39,126.64 and 15,777.60

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Solution

The fourth proportional to 28,353.12, 39,126.64 and 15,777.60 is: 21,772.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.12 : 39,126.64 = 15,777.60 : x
  2. Step 2: Convert to fraction form
    28,353.12/39,126.64 = 15,777.60/x
  3. Step 3: Cross multiply
    28,353.12x = 39,126.64 × 15,777.60
  4. Step 4: Simplify right side
    28,353.12x = 617,324,475.26
  5. Step 5: Solve for x
    x = 617,324,475.26/28,353.12
  6. Step 6: Final answer
    x = 21,772.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.