Home / 30,999.28-42,778.08-16,851.76

Finding the Fourth Proportional to 30,999.28, 42,778.08 and 16,851.76

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Solution

The fourth proportional to 30,999.28, 42,778.08 and 16,851.76 is: 23,254.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.28 : 42,778.08 = 16,851.76 : x
  2. Step 2: Convert to fraction form
    30,999.28/42,778.08 = 16,851.76/x
  3. Step 3: Cross multiply
    30,999.28x = 42,778.08 × 16,851.76
  4. Step 4: Simplify right side
    30,999.28x = 720,885,937.42
  5. Step 5: Solve for x
    x = 720,885,937.42/30,999.28
  6. Step 6: Final answer
    x = 23,254.93

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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.