Home / 15,276.18-21,078.99-8,561.28

Finding the Fourth Proportional to 15,276.18, 21,078.99 and 8,561.28

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Solution

The fourth proportional to 15,276.18, 21,078.99 and 8,561.28 is: 11,813.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,276.18 : 21,078.99 = 8,561.28 : x
  2. Step 2: Convert to fraction form
    15,276.18/21,078.99 = 8,561.28/x
  3. Step 3: Cross multiply
    15,276.18x = 21,078.99 × 8,561.28
  4. Step 4: Simplify right side
    15,276.18x = 180,463,135.51
  5. Step 5: Solve for x
    x = 180,463,135.51/15,276.18
  6. Step 6: Final answer
    x = 11,813.37

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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.