Home / 13,139.50-18,133.09-7,398.93

Finding the Fourth Proportional to 13,139.50, 18,133.09 and 7,398.93

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Solution

The fourth proportional to 13,139.50, 18,133.09 and 7,398.93 is: 10,210.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.50 : 18,133.09 = 7,398.93 : x
  2. Step 2: Convert to fraction form
    13,139.50/18,133.09 = 7,398.93/x
  3. Step 3: Cross multiply
    13,139.50x = 18,133.09 × 7,398.93
  4. Step 4: Simplify right side
    13,139.50x = 134,165,463.59
  5. Step 5: Solve for x
    x = 134,165,463.59/13,139.50
  6. Step 6: Final answer
    x = 10,210.85

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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.