Home / 28,488.16-39,315.60-15,912.64

Finding the Fourth Proportional to 28,488.16, 39,315.60 and 15,912.64

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Solution

The fourth proportional to 28,488.16, 39,315.60 and 15,912.64 is: 21,960.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.16 : 39,315.60 = 15,912.64 : x
  2. Step 2: Convert to fraction form
    28,488.16/39,315.60 = 15,912.64/x
  3. Step 3: Cross multiply
    28,488.16x = 39,315.60 × 15,912.64
  4. Step 4: Simplify right side
    28,488.16x = 625,614,989.18
  5. Step 5: Solve for x
    x = 625,614,989.18/28,488.16
  6. Step 6: Final answer
    x = 21,960.53

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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.