Home / 13,107.85-18,088.68-7,139.50

Finding the Fourth Proportional to 13,107.85, 18,088.68 and 7,139.50

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Solution

The fourth proportional to 13,107.85, 18,088.68 and 7,139.50 is: 9,852.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.85 : 18,088.68 = 7,139.50 : x
  2. Step 2: Convert to fraction form
    13,107.85/18,088.68 = 7,139.50/x
  3. Step 3: Cross multiply
    13,107.85x = 18,088.68 × 7,139.50
  4. Step 4: Simplify right side
    13,107.85x = 129,144,130.86
  5. Step 5: Solve for x
    x = 129,144,130.86/13,107.85
  6. Step 6: Final answer
    x = 9,852.43

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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.