Home / 13,678.03-18,875.67-7,390.40

Finding the Fourth Proportional to 13,678.03, 18,875.67 and 7,390.40

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Solution

The fourth proportional to 13,678.03, 18,875.67 and 7,390.40 is: 10,198.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.03 : 18,875.67 = 7,390.40 : x
  2. Step 2: Convert to fraction form
    13,678.03/18,875.67 = 7,390.40/x
  3. Step 3: Cross multiply
    13,678.03x = 18,875.67 × 7,390.40
  4. Step 4: Simplify right side
    13,678.03x = 139,498,751.57
  5. Step 5: Solve for x
    x = 139,498,751.57/13,678.03
  6. Step 6: Final answer
    x = 10,198.75

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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.