Home / 13,139.18-19,714.64-7,137.08

Finding the Fourth Proportional to 13,139.18, 19,714.64 and 7,137.08

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Solution

The fourth proportional to 13,139.18, 19,714.64 and 7,137.08 is: 10,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.18 : 19,714.64 = 7,137.08 : x
  2. Step 2: Convert to fraction form
    13,139.18/19,714.64 = 7,137.08/x
  3. Step 3: Cross multiply
    13,139.18x = 19,714.64 × 7,137.08
  4. Step 4: Simplify right side
    13,139.18x = 140,704,828.59
  5. Step 5: Solve for x
    x = 140,704,828.59/13,139.18
  6. Step 6: Final answer
    x = 10,708.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.