Home / 13,217.60-18,239.74-7,909.28

Finding the Fourth Proportional to 13,217.60, 18,239.74 and 7,909.28

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Solution

The fourth proportional to 13,217.60, 18,239.74 and 7,909.28 is: 10,914.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.60 : 18,239.74 = 7,909.28 : x
  2. Step 2: Convert to fraction form
    13,217.60/18,239.74 = 7,909.28/x
  3. Step 3: Cross multiply
    13,217.60x = 18,239.74 × 7,909.28
  4. Step 4: Simplify right side
    13,217.60x = 144,263,210.79
  5. Step 5: Solve for x
    x = 144,263,210.79/13,217.60
  6. Step 6: Final answer
    x = 10,914.48

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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.