Home / 30,955.56-42,719.52-18,209.64

Finding the Fourth Proportional to 30,955.56, 42,719.52 and 18,209.64

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Solution

The fourth proportional to 30,955.56, 42,719.52 and 18,209.64 is: 25,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,955.56 : 42,719.52 = 18,209.64 : x
  2. Step 2: Convert to fraction form
    30,955.56/42,719.52 = 18,209.64/x
  3. Step 3: Cross multiply
    30,955.56x = 42,719.52 × 18,209.64
  4. Step 4: Simplify right side
    30,955.56x = 777,907,080.17
  5. Step 5: Solve for x
    x = 777,907,080.17/30,955.56
  6. Step 6: Final answer
    x = 25,129.80

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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.