Home / 13,148.64-18,120-9,416.16

Finding the Fourth Proportional to 13,148.64, 18,120 and 9,416.16

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Solution

The fourth proportional to 13,148.64, 18,120 and 9,416.16 is: 12,976.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.64 : 18,120 = 9,416.16 : x
  2. Step 2: Convert to fraction form
    13,148.64/18,120 = 9,416.16/x
  3. Step 3: Cross multiply
    13,148.64x = 18,120 × 9,416.16
  4. Step 4: Simplify right side
    13,148.64x = 170,620,819.20
  5. Step 5: Solve for x
    x = 170,620,819.20/13,148.64
  6. Step 6: Final answer
    x = 12,976.31

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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.