Home / 30,889.64-42,580.50-18,930.80

Finding the Fourth Proportional to 30,889.64, 42,580.50 and 18,930.80

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Solution

The fourth proportional to 30,889.64, 42,580.50 and 18,930.80 is: 26,095.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,889.64 : 42,580.50 = 18,930.80 : x
  2. Step 2: Convert to fraction form
    30,889.64/42,580.50 = 18,930.80/x
  3. Step 3: Cross multiply
    30,889.64x = 42,580.50 × 18,930.80
  4. Step 4: Simplify right side
    30,889.64x = 806,082,929.40
  5. Step 5: Solve for x
    x = 806,082,929.40/30,889.64
  6. Step 6: Final answer
    x = 26,095.58

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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.