Home / 30,955.96-42,720.20-16,809.72

Finding the Fourth Proportional to 30,955.96, 42,720.20 and 16,809.72

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Solution

The fourth proportional to 30,955.96, 42,720.20 and 16,809.72 is: 23,197.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,955.96 : 42,720.20 = 16,809.72 : x
  2. Step 2: Convert to fraction form
    30,955.96/42,720.20 = 16,809.72/x
  3. Step 3: Cross multiply
    30,955.96x = 42,720.20 × 16,809.72
  4. Step 4: Simplify right side
    30,955.96x = 718,114,600.34
  5. Step 5: Solve for x
    x = 718,114,600.34/30,955.96
  6. Step 6: Final answer
    x = 23,197.94

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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.