Home / 13,605.48-18,781.32-8,302.20

Finding the Fourth Proportional to 13,605.48, 18,781.32 and 8,302.20

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Solution

The fourth proportional to 13,605.48, 18,781.32 and 8,302.20 is: 11,460.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.48 : 18,781.32 = 8,302.20 : x
  2. Step 2: Convert to fraction form
    13,605.48/18,781.32 = 8,302.20/x
  3. Step 3: Cross multiply
    13,605.48x = 18,781.32 × 8,302.20
  4. Step 4: Simplify right side
    13,605.48x = 155,926,274.90
  5. Step 5: Solve for x
    x = 155,926,274.90/13,605.48
  6. Step 6: Final answer
    x = 11,460.55

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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.