Home / 30,661.60-42,295.68-19,311.57

Finding the Fourth Proportional to 30,661.60, 42,295.68 and 19,311.57

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Solution

The fourth proportional to 30,661.60, 42,295.68 and 19,311.57 is: 26,639.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.60 : 42,295.68 = 19,311.57 : x
  2. Step 2: Convert to fraction form
    30,661.60/42,295.68 = 19,311.57/x
  3. Step 3: Cross multiply
    30,661.60x = 42,295.68 × 19,311.57
  4. Step 4: Simplify right side
    30,661.60x = 816,795,985.02
  5. Step 5: Solve for x
    x = 816,795,985.02/30,661.60
  6. Step 6: Final answer
    x = 26,639.05

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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.