Home / 18,985.56-28,464.66-9,117.24

Finding the Fourth Proportional to 18,985.56, 28,464.66 and 9,117.24

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Solution

The fourth proportional to 18,985.56, 28,464.66 and 9,117.24 is: 13,669.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.56 : 28,464.66 = 9,117.24 : x
  2. Step 2: Convert to fraction form
    18,985.56/28,464.66 = 9,117.24/x
  3. Step 3: Cross multiply
    18,985.56x = 28,464.66 × 9,117.24
  4. Step 4: Simplify right side
    18,985.56x = 259,519,136.74
  5. Step 5: Solve for x
    x = 259,519,136.74/18,985.56
  6. Step 6: Final answer
    x = 13,669.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.