Home / 28,311.16-39,070.14-15,391.30

Finding the Fourth Proportional to 28,311.16, 39,070.14 and 15,391.30

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Solution

The fourth proportional to 28,311.16, 39,070.14 and 15,391.30 is: 21,240.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.16 : 39,070.14 = 15,391.30 : x
  2. Step 2: Convert to fraction form
    28,311.16/39,070.14 = 15,391.30/x
  3. Step 3: Cross multiply
    28,311.16x = 39,070.14 × 15,391.30
  4. Step 4: Simplify right side
    28,311.16x = 601,340,245.78
  5. Step 5: Solve for x
    x = 601,340,245.78/28,311.16
  6. Step 6: Final answer
    x = 21,240.40

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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.