Home / 13,139.10-19,711.80-4,374.09

Finding the Fourth Proportional to 13,139.10, 19,711.80 and 4,374.09

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Solution

The fourth proportional to 13,139.10, 19,711.80 and 4,374.09 is: 6,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.10 : 19,711.80 = 4,374.09 : x
  2. Step 2: Convert to fraction form
    13,139.10/19,711.80 = 4,374.09/x
  3. Step 3: Cross multiply
    13,139.10x = 19,711.80 × 4,374.09
  4. Step 4: Simplify right side
    13,139.10x = 86,221,187.26
  5. Step 5: Solve for x
    x = 86,221,187.26/13,139.10
  6. Step 6: Final answer
    x = 6,562.18

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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.