Home / 28,587.15-39,449.79-15,666.30

Finding the Fourth Proportional to 28,587.15, 39,449.79 and 15,666.30

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Solution

The fourth proportional to 28,587.15, 39,449.79 and 15,666.30 is: 21,619.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.15 : 39,449.79 = 15,666.30 : x
  2. Step 2: Convert to fraction form
    28,587.15/39,449.79 = 15,666.30/x
  3. Step 3: Cross multiply
    28,587.15x = 39,449.79 × 15,666.30
  4. Step 4: Simplify right side
    28,587.15x = 618,032,245.08
  5. Step 5: Solve for x
    x = 618,032,245.08/28,587.15
  6. Step 6: Final answer
    x = 21,619.23

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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.