Home / 28,336.86-42,669.99-20,993.40

Finding the Fourth Proportional to 28,336.86, 42,669.99 and 20,993.40

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Solution

The fourth proportional to 28,336.86, 42,669.99 and 20,993.40 is: 31,612.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.86 : 42,669.99 = 20,993.40 : x
  2. Step 2: Convert to fraction form
    28,336.86/42,669.99 = 20,993.40/x
  3. Step 3: Cross multiply
    28,336.86x = 42,669.99 × 20,993.40
  4. Step 4: Simplify right side
    28,336.86x = 895,788,168.07
  5. Step 5: Solve for x
    x = 895,788,168.07/28,336.86
  6. Step 6: Final answer
    x = 31,612.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.