Home / 13,679.03-18,877.05-7,391.40

Finding the Fourth Proportional to 13,679.03, 18,877.05 and 7,391.40

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Solution

The fourth proportional to 13,679.03, 18,877.05 and 7,391.40 is: 10,200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.03 : 18,877.05 = 7,391.40 : x
  2. Step 2: Convert to fraction form
    13,679.03/18,877.05 = 7,391.40/x
  3. Step 3: Cross multiply
    13,679.03x = 18,877.05 × 7,391.40
  4. Step 4: Simplify right side
    13,679.03x = 139,527,827.37
  5. Step 5: Solve for x
    x = 139,527,827.37/13,679.03
  6. Step 6: Final answer
    x = 10,200.13

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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.