Home / 13,037.09-19,387.91-12,621.90

Finding the Fourth Proportional to 13,037.09, 19,387.91 and 12,621.90

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Solution

The fourth proportional to 13,037.09, 19,387.91 and 12,621.90 is: 18,770.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,037.09 : 19,387.91 = 12,621.90 : x
  2. Step 2: Convert to fraction form
    13,037.09/19,387.91 = 12,621.90/x
  3. Step 3: Cross multiply
    13,037.09x = 19,387.91 × 12,621.90
  4. Step 4: Simplify right side
    13,037.09x = 244,712,101.18
  5. Step 5: Solve for x
    x = 244,712,101.18/13,037.09
  6. Step 6: Final answer
    x = 18,770.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.