Home / 13,130.62-18,126.94-10,139.74

Finding the Fourth Proportional to 13,130.62, 18,126.94 and 10,139.74

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Solution

The fourth proportional to 13,130.62, 18,126.94 and 10,139.74 is: 13,998.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.62 : 18,126.94 = 10,139.74 : x
  2. Step 2: Convert to fraction form
    13,130.62/18,126.94 = 10,139.74/x
  3. Step 3: Cross multiply
    13,130.62x = 18,126.94 × 10,139.74
  4. Step 4: Simplify right side
    13,130.62x = 183,802,367.96
  5. Step 5: Solve for x
    x = 183,802,367.96/13,130.62
  6. Step 6: Final answer
    x = 13,998.00

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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.