Home / 18,438.28-25,437.60-11,352.40

Finding the Fourth Proportional to 18,438.28, 25,437.60 and 11,352.40

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Solution

The fourth proportional to 18,438.28, 25,437.60 and 11,352.40 is: 15,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.28 : 25,437.60 = 11,352.40 : x
  2. Step 2: Convert to fraction form
    18,438.28/25,437.60 = 11,352.40/x
  3. Step 3: Cross multiply
    18,438.28x = 25,437.60 × 11,352.40
  4. Step 4: Simplify right side
    18,438.28x = 288,777,810.24
  5. Step 5: Solve for x
    x = 288,777,810.24/18,438.28
  6. Step 6: Final answer
    x = 15,661.86

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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.