Home / 30,886.04-42,622.80-18,311.60

Finding the Fourth Proportional to 30,886.04, 42,622.80 and 18,311.60

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Solution

The fourth proportional to 30,886.04, 42,622.80 and 18,311.60 is: 25,270.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,886.04 : 42,622.80 = 18,311.60 : x
  2. Step 2: Convert to fraction form
    30,886.04/42,622.80 = 18,311.60/x
  3. Step 3: Cross multiply
    30,886.04x = 42,622.80 × 18,311.60
  4. Step 4: Simplify right side
    30,886.04x = 780,491,664.48
  5. Step 5: Solve for x
    x = 780,491,664.48/30,886.04
  6. Step 6: Final answer
    x = 25,270.05

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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.