Home / 30,960.76-42,710.70-18,376.60

Finding the Fourth Proportional to 30,960.76, 42,710.70 and 18,376.60

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Solution

The fourth proportional to 30,960.76, 42,710.70 and 18,376.60 is: 25,350.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.76 : 42,710.70 = 18,376.60 : x
  2. Step 2: Convert to fraction form
    30,960.76/42,710.70 = 18,376.60/x
  3. Step 3: Cross multiply
    30,960.76x = 42,710.70 × 18,376.60
  4. Step 4: Simplify right side
    30,960.76x = 784,877,449.62
  5. Step 5: Solve for x
    x = 784,877,449.62/30,960.76
  6. Step 6: Final answer
    x = 25,350.72

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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.