Home / 28,289.64-42,471.54-18,971.34

Finding the Fourth Proportional to 28,289.64, 42,471.54 and 18,971.34

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Solution

The fourth proportional to 28,289.64, 42,471.54 and 18,971.34 is: 28,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.64 : 42,471.54 = 18,971.34 : x
  2. Step 2: Convert to fraction form
    28,289.64/42,471.54 = 18,971.34/x
  3. Step 3: Cross multiply
    28,289.64x = 42,471.54 × 18,971.34
  4. Step 4: Simplify right side
    28,289.64x = 805,742,025.66
  5. Step 5: Solve for x
    x = 805,742,025.66/28,289.64
  6. Step 6: Final answer
    x = 28,481.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.