Home / 13,478.38-18,594.89-8,440.45

Finding the Fourth Proportional to 13,478.38, 18,594.89 and 8,440.45

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Solution

The fourth proportional to 13,478.38, 18,594.89 and 8,440.45 is: 11,644.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.38 : 18,594.89 = 8,440.45 : x
  2. Step 2: Convert to fraction form
    13,478.38/18,594.89 = 8,440.45/x
  3. Step 3: Cross multiply
    13,478.38x = 18,594.89 × 8,440.45
  4. Step 4: Simplify right side
    13,478.38x = 156,949,182.26
  5. Step 5: Solve for x
    x = 156,949,182.26/13,478.38
  6. Step 6: Final answer
    x = 11,644.52

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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.