Home / 13,140.94-18,128.70-8,890.48

Finding the Fourth Proportional to 13,140.94, 18,128.70 and 8,890.48

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Solution

The fourth proportional to 13,140.94, 18,128.70 and 8,890.48 is: 12,264.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.94 : 18,128.70 = 8,890.48 : x
  2. Step 2: Convert to fraction form
    13,140.94/18,128.70 = 8,890.48/x
  3. Step 3: Cross multiply
    13,140.94x = 18,128.70 × 8,890.48
  4. Step 4: Simplify right side
    13,140.94x = 161,172,844.78
  5. Step 5: Solve for x
    x = 161,172,844.78/13,140.94
  6. Step 6: Final answer
    x = 12,264.94

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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.