Home / 28,080.79-42,100.12-16,985.21

Finding the Fourth Proportional to 28,080.79, 42,100.12 and 16,985.21

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Solution

The fourth proportional to 28,080.79, 42,100.12 and 16,985.21 is: 25,465.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.79 : 42,100.12 = 16,985.21 : x
  2. Step 2: Convert to fraction form
    28,080.79/42,100.12 = 16,985.21/x
  3. Step 3: Cross multiply
    28,080.79x = 42,100.12 × 16,985.21
  4. Step 4: Simplify right side
    28,080.79x = 715,079,189.96
  5. Step 5: Solve for x
    x = 715,079,189.96/28,080.79
  6. Step 6: Final answer
    x = 25,465.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.