Home / 15,503.52-21,395.64-8,790.44

Finding the Fourth Proportional to 15,503.52, 21,395.64 and 8,790.44

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Solution

The fourth proportional to 15,503.52, 21,395.64 and 8,790.44 is: 12,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.52 : 21,395.64 = 8,790.44 : x
  2. Step 2: Convert to fraction form
    15,503.52/21,395.64 = 8,790.44/x
  3. Step 3: Cross multiply
    15,503.52x = 21,395.64 × 8,790.44
  4. Step 4: Simplify right side
    15,503.52x = 188,077,089.68
  5. Step 5: Solve for x
    x = 188,077,089.68/15,503.52
  6. Step 6: Final answer
    x = 12,131.25

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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.