Home / 13,581.51-18,742.45-8,276.34

Finding the Fourth Proportional to 13,581.51, 18,742.45 and 8,276.34

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Solution

The fourth proportional to 13,581.51, 18,742.45 and 8,276.34 is: 11,421.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.51 : 18,742.45 = 8,276.34 : x
  2. Step 2: Convert to fraction form
    13,581.51/18,742.45 = 8,276.34/x
  3. Step 3: Cross multiply
    13,581.51x = 18,742.45 × 8,276.34
  4. Step 4: Simplify right side
    13,581.51x = 155,118,888.63
  5. Step 5: Solve for x
    x = 155,118,888.63/13,581.51
  6. Step 6: Final answer
    x = 11,421.33

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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.