Home / 28,720.07-39,601.61-19,646.90

Finding the Fourth Proportional to 28,720.07, 39,601.61 and 19,646.90

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Solution

The fourth proportional to 28,720.07, 39,601.61 and 19,646.90 is: 27,090.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.07 : 39,601.61 = 19,646.90 : x
  2. Step 2: Convert to fraction form
    28,720.07/39,601.61 = 19,646.90/x
  3. Step 3: Cross multiply
    28,720.07x = 39,601.61 × 19,646.90
  4. Step 4: Simplify right side
    28,720.07x = 778,049,020.21
  5. Step 5: Solve for x
    x = 778,049,020.21/28,720.07
  6. Step 6: Final answer
    x = 27,090.78

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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.