Home / 30,999.08-42,780.48-16,851.62

Finding the Fourth Proportional to 30,999.08, 42,780.48 and 16,851.62

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Solution

The fourth proportional to 30,999.08, 42,780.48 and 16,851.62 is: 23,256.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.08 : 42,780.48 = 16,851.62 : x
  2. Step 2: Convert to fraction form
    30,999.08/42,780.48 = 16,851.62/x
  3. Step 3: Cross multiply
    30,999.08x = 42,780.48 × 16,851.62
  4. Step 4: Simplify right side
    30,999.08x = 720,920,392.38
  5. Step 5: Solve for x
    x = 720,920,392.38/30,999.08
  6. Step 6: Final answer
    x = 23,256.19

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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.