Home / 28,965.34-39,975.42-16,390.90

Finding the Fourth Proportional to 28,965.34, 39,975.42 and 16,390.90

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Solution

The fourth proportional to 28,965.34, 39,975.42 and 16,390.90 is: 22,621.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965.34 : 39,975.42 = 16,390.90 : x
  2. Step 2: Convert to fraction form
    28,965.34/39,975.42 = 16,390.90/x
  3. Step 3: Cross multiply
    28,965.34x = 39,975.42 × 16,390.90
  4. Step 4: Simplify right side
    28,965.34x = 655,233,111.68
  5. Step 5: Solve for x
    x = 655,233,111.68/28,965.34
  6. Step 6: Final answer
    x = 22,621.28

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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.