Home / 28,013.40-38,658.06-15,438.60

Finding the Fourth Proportional to 28,013.40, 38,658.06 and 15,438.60

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Solution

The fourth proportional to 28,013.40, 38,658.06 and 15,438.60 is: 21,305.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.40 : 38,658.06 = 15,438.60 : x
  2. Step 2: Convert to fraction form
    28,013.40/38,658.06 = 15,438.60/x
  3. Step 3: Cross multiply
    28,013.40x = 38,658.06 × 15,438.60
  4. Step 4: Simplify right side
    28,013.40x = 596,826,325.12
  5. Step 5: Solve for x
    x = 596,826,325.12/28,013.40
  6. Step 6: Final answer
    x = 21,305.03

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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.