Home / 13,139.56-18,130.80-7,550.56

Finding the Fourth Proportional to 13,139.56, 18,130.80 and 7,550.56

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Solution

The fourth proportional to 13,139.56, 18,130.80 and 7,550.56 is: 10,418.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.56 : 18,130.80 = 7,550.56 : x
  2. Step 2: Convert to fraction form
    13,139.56/18,130.80 = 7,550.56/x
  3. Step 3: Cross multiply
    13,139.56x = 18,130.80 × 7,550.56
  4. Step 4: Simplify right side
    13,139.56x = 136,897,693.25
  5. Step 5: Solve for x
    x = 136,897,693.25/13,139.56
  6. Step 6: Final answer
    x = 10,418.74

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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.