Home / 13,588.20-18,750.90-7,618.68

Finding the Fourth Proportional to 13,588.20, 18,750.90 and 7,618.68

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Solution

The fourth proportional to 13,588.20, 18,750.90 and 7,618.68 is: 10,513.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,588.20 : 18,750.90 = 7,618.68 : x
  2. Step 2: Convert to fraction form
    13,588.20/18,750.90 = 7,618.68/x
  3. Step 3: Cross multiply
    13,588.20x = 18,750.90 × 7,618.68
  4. Step 4: Simplify right side
    13,588.20x = 142,857,106.81
  5. Step 5: Solve for x
    x = 142,857,106.81/13,588.20
  6. Step 6: Final answer
    x = 10,513.32

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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.