Home / 28,965.80-39,973.02-16,390.28

Finding the Fourth Proportional to 28,965.80, 39,973.02 and 16,390.28

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Solution

The fourth proportional to 28,965.80, 39,973.02 and 16,390.28 is: 22,618.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965.80 : 39,973.02 = 16,390.28 : x
  2. Step 2: Convert to fraction form
    28,965.80/39,973.02 = 16,390.28/x
  3. Step 3: Cross multiply
    28,965.80x = 39,973.02 × 16,390.28
  4. Step 4: Simplify right side
    28,965.80x = 655,168,990.25
  5. Step 5: Solve for x
    x = 655,168,990.25/28,965.80
  6. Step 6: Final answer
    x = 22,618.71

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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.