Home / 13,128.20-18,117.39-7,463.90

Finding the Fourth Proportional to 13,128.20, 18,117.39 and 7,463.90

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Solution

The fourth proportional to 13,128.20, 18,117.39 and 7,463.90 is: 10,300.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.20 : 18,117.39 = 7,463.90 : x
  2. Step 2: Convert to fraction form
    13,128.20/18,117.39 = 7,463.90/x
  3. Step 3: Cross multiply
    13,128.20x = 18,117.39 × 7,463.90
  4. Step 4: Simplify right side
    13,128.20x = 135,226,296.63
  5. Step 5: Solve for x
    x = 135,226,296.63/13,128.20
  6. Step 6: Final answer
    x = 10,300.45

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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.