Home / 30,641.60-42,284.32-18,724.88

Finding the Fourth Proportional to 30,641.60, 42,284.32 and 18,724.88

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Solution

The fourth proportional to 30,641.60, 42,284.32 and 18,724.88 is: 25,839.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,641.60 : 42,284.32 = 18,724.88 : x
  2. Step 2: Convert to fraction form
    30,641.60/42,284.32 = 18,724.88/x
  3. Step 3: Cross multiply
    30,641.60x = 42,284.32 × 18,724.88
  4. Step 4: Simplify right side
    30,641.60x = 791,768,817.88
  5. Step 5: Solve for x
    x = 791,768,817.88/30,641.60
  6. Step 6: Final answer
    x = 25,839.67

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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.