Home / 28,765.16-39,686.40-16,820.04

Finding the Fourth Proportional to 28,765.16, 39,686.40 and 16,820.04

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Solution

The fourth proportional to 28,765.16, 39,686.40 and 16,820.04 is: 23,206.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.16 : 39,686.40 = 16,820.04 : x
  2. Step 2: Convert to fraction form
    28,765.16/39,686.40 = 16,820.04/x
  3. Step 3: Cross multiply
    28,765.16x = 39,686.40 × 16,820.04
  4. Step 4: Simplify right side
    28,765.16x = 667,526,984.28
  5. Step 5: Solve for x
    x = 667,526,984.28/28,765.16
  6. Step 6: Final answer
    x = 23,206.09

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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.