Home / 15,261.87-21,064.64-8,977.83

Finding the Fourth Proportional to 15,261.87, 21,064.64 and 8,977.83

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Solution

The fourth proportional to 15,261.87, 21,064.64 and 8,977.83 is: 12,391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,261.87 : 21,064.64 = 8,977.83 : x
  2. Step 2: Convert to fraction form
    15,261.87/21,064.64 = 8,977.83/x
  3. Step 3: Cross multiply
    15,261.87x = 21,064.64 × 8,977.83
  4. Step 4: Simplify right side
    15,261.87x = 189,114,712.04
  5. Step 5: Solve for x
    x = 189,114,712.04/15,261.87
  6. Step 6: Final answer
    x = 12,391.32

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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.