Home / 31,078.08-42,880.32-18,506.88

Finding the Fourth Proportional to 31,078.08, 42,880.32 and 18,506.88

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Solution

The fourth proportional to 31,078.08, 42,880.32 and 18,506.88 is: 25,535.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,078.08 : 42,880.32 = 18,506.88 : x
  2. Step 2: Convert to fraction form
    31,078.08/42,880.32 = 18,506.88/x
  3. Step 3: Cross multiply
    31,078.08x = 42,880.32 × 18,506.88
  4. Step 4: Simplify right side
    31,078.08x = 793,580,936.60
  5. Step 5: Solve for x
    x = 793,580,936.60/31,078.08
  6. Step 6: Final answer
    x = 25,535.07

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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.